Home / 20,935.28-31,276.36-13,478.96

Finding the Fourth Proportional to 20,935.28, 31,276.36 and 13,478.96

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Solution

The fourth proportional to 20,935.28, 31,276.36 and 13,478.96 is: 20,136.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.28 : 31,276.36 = 13,478.96 : x
  2. Step 2: Convert to fraction form
    20,935.28/31,276.36 = 13,478.96/x
  3. Step 3: Cross multiply
    20,935.28x = 31,276.36 × 13,478.96
  4. Step 4: Simplify right side
    20,935.28x = 421,572,805.39
  5. Step 5: Solve for x
    x = 421,572,805.39/20,935.28
  6. Step 6: Final answer
    x = 20,136.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.