Home / 20,502.57-28,298.15-13,424.88

Finding the Fourth Proportional to 20,502.57, 28,298.15 and 13,424.88

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Solution

The fourth proportional to 20,502.57, 28,298.15 and 13,424.88 is: 18,529.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502.57 : 28,298.15 = 13,424.88 : x
  2. Step 2: Convert to fraction form
    20,502.57/28,298.15 = 13,424.88/x
  3. Step 3: Cross multiply
    20,502.57x = 28,298.15 × 13,424.88
  4. Step 4: Simplify right side
    20,502.57x = 379,899,267.97
  5. Step 5: Solve for x
    x = 379,899,267.97/20,502.57
  6. Step 6: Final answer
    x = 18,529.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.