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Finding the Fourth Proportional to 8,897.21, 12,278.68 and 4,918.23

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Solution

The fourth proportional to 8,897.21, 12,278.68 and 4,918.23 is: 6,787.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,897.21 : 12,278.68 = 4,918.23 : x
  2. Step 2: Convert to fraction form
    8,897.21/12,278.68 = 4,918.23/x
  3. Step 3: Cross multiply
    8,897.21x = 12,278.68 × 4,918.23
  4. Step 4: Simplify right side
    8,897.21x = 60,389,360.04
  5. Step 5: Solve for x
    x = 60,389,360.04/8,897.21
  6. Step 6: Final answer
    x = 6,787.45

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Half scale
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Double scale
Find fourth proportional to 8,898.21, 12,280.06 and 4,919.23
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.