Home / 20,384.82-28,131.25-11,432.13

Finding the Fourth Proportional to 20,384.82, 28,131.25 and 11,432.13

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Solution

The fourth proportional to 20,384.82, 28,131.25 and 11,432.13 is: 15,776.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.82 : 28,131.25 = 11,432.13 : x
  2. Step 2: Convert to fraction form
    20,384.82/28,131.25 = 11,432.13/x
  3. Step 3: Cross multiply
    20,384.82x = 28,131.25 × 11,432.13
  4. Step 4: Simplify right side
    20,384.82x = 321,600,058.10
  5. Step 5: Solve for x
    x = 321,600,058.10/20,384.82
  6. Step 6: Final answer
    x = 15,776.45

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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.