Home / 10,120,915.20-15,181,372.80-9,144,638.40

Finding the Fourth Proportional to 10,120,915.20, 15,181,372.80 and 9,144,638.40

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Solution

The fourth proportional to 10,120,915.20, 15,181,372.80 and 9,144,638.40 is: 13,716,957.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,120,915.20 : 15,181,372.80 = 9,144,638.40 : x
  2. Step 2: Convert to fraction form
    10,120,915.20/15,181,372.80 = 9,144,638.40/x
  3. Step 3: Cross multiply
    10,120,915.20x = 15,181,372.80 × 9,144,638.40
  4. Step 4: Simplify right side
    10,120,915.20x = 138,828,164,671,595.53
  5. Step 5: Solve for x
    x = 138,828,164,671,595.53/10,120,915.20
  6. Step 6: Final answer
    x = 13,716,957.60

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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.