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Finding the Fourth Proportional to 12,159.39, 18,239.08 and 9,390.10

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Solution

The fourth proportional to 12,159.39, 18,239.08 and 9,390.10 is: 14,085.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.39 : 18,239.08 = 9,390.10 : x
  2. Step 2: Convert to fraction form
    12,159.39/18,239.08 = 9,390.10/x
  3. Step 3: Cross multiply
    12,159.39x = 18,239.08 × 9,390.10
  4. Step 4: Simplify right side
    12,159.39x = 171,266,785.11
  5. Step 5: Solve for x
    x = 171,266,785.11/12,159.39
  6. Step 6: Final answer
    x = 14,085.15

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.