Home / 20,572.05-28,389.98-11,620.87

Finding the Fourth Proportional to 20,572.05, 28,389.98 and 11,620.87

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Solution

The fourth proportional to 20,572.05, 28,389.98 and 11,620.87 is: 16,037.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.05 : 28,389.98 = 11,620.87 : x
  2. Step 2: Convert to fraction form
    20,572.05/28,389.98 = 11,620.87/x
  3. Step 3: Cross multiply
    20,572.05x = 28,389.98 × 11,620.87
  4. Step 4: Simplify right side
    20,572.05x = 329,916,208.78
  5. Step 5: Solve for x
    x = 329,916,208.78/20,572.05
  6. Step 6: Final answer
    x = 16,037.11

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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.