Home / 13,935.20-20,909.61-6,915.87

Finding the Fourth Proportional to 13,935.20, 20,909.61 and 6,915.87

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Solution

The fourth proportional to 13,935.20, 20,909.61 and 6,915.87 is: 10,377.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,935.20 : 20,909.61 = 6,915.87 : x
  2. Step 2: Convert to fraction form
    13,935.20/20,909.61 = 6,915.87/x
  3. Step 3: Cross multiply
    13,935.20x = 20,909.61 × 6,915.87
  4. Step 4: Simplify right side
    13,935.20x = 144,608,144.51
  5. Step 5: Solve for x
    x = 144,608,144.51/13,935.20
  6. Step 6: Final answer
    x = 10,377.19

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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.