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Finding the Fourth Proportional to 8,904.04, 13,280.84 and 8,390.11

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Solution

The fourth proportional to 8,904.04, 13,280.84 and 8,390.11 is: 12,514.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,904.04 : 13,280.84 = 8,390.11 : x
  2. Step 2: Convert to fraction form
    8,904.04/13,280.84 = 8,390.11/x
  3. Step 3: Cross multiply
    8,904.04x = 13,280.84 × 8,390.11
  4. Step 4: Simplify right side
    8,904.04x = 111,427,708.49
  5. Step 5: Solve for x
    x = 111,427,708.49/8,904.04
  6. Step 6: Final answer
    x = 12,514.29

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Half scale
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Double scale
Find fourth proportional to 8,905.04, 13,282.33 and 8,391.11
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.