Home / 20,937.72-31,433.25-13,572.99

Finding the Fourth Proportional to 20,937.72, 31,433.25 and 13,572.99

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Solution

The fourth proportional to 20,937.72, 31,433.25 and 13,572.99 is: 20,376.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.72 : 31,433.25 = 13,572.99 : x
  2. Step 2: Convert to fraction form
    20,937.72/31,433.25 = 13,572.99/x
  3. Step 3: Cross multiply
    20,937.72x = 31,433.25 × 13,572.99
  4. Step 4: Simplify right side
    20,937.72x = 426,643,187.92
  5. Step 5: Solve for x
    x = 426,643,187.92/20,937.72
  6. Step 6: Final answer
    x = 20,376.77

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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.