Home / 13,757.28-20,620.80-7,915.20

Finding the Fourth Proportional to 13,757.28, 20,620.80 and 7,915.20

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Solution

The fourth proportional to 13,757.28, 20,620.80 and 7,915.20 is: 11,864.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.28 : 20,620.80 = 7,915.20 : x
  2. Step 2: Convert to fraction form
    13,757.28/20,620.80 = 7,915.20/x
  3. Step 3: Cross multiply
    13,757.28x = 20,620.80 × 7,915.20
  4. Step 4: Simplify right side
    13,757.28x = 163,217,756.16
  5. Step 5: Solve for x
    x = 163,217,756.16/13,757.28
  6. Step 6: Final answer
    x = 11,864.10

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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.