Home / 12,487,915.20-18,727,207.20-8,690,116.80

Finding the Fourth Proportional to 12,487,915.20, 18,727,207.20 and 8,690,116.80

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Solution

The fourth proportional to 12,487,915.20, 18,727,207.20 and 8,690,116.80 is: 13,031,928.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487,915.20 : 18,727,207.20 = 8,690,116.80 : x
  2. Step 2: Convert to fraction form
    12,487,915.20/18,727,207.20 = 8,690,116.80/x
  3. Step 3: Cross multiply
    12,487,915.20x = 18,727,207.20 × 8,690,116.80
  4. Step 4: Simplify right side
    12,487,915.20x = 162,741,617,905,800.97
  5. Step 5: Solve for x
    x = 162,741,617,905,800.97/12,487,915.20
  6. Step 6: Final answer
    x = 13,031,928.49

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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.