Home / 20,331.10-28,054.47-11,377.90

Finding the Fourth Proportional to 20,331.10, 28,054.47 and 11,377.90

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Solution

The fourth proportional to 20,331.10, 28,054.47 and 11,377.90 is: 15,700.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.10 : 28,054.47 = 11,377.90 : x
  2. Step 2: Convert to fraction form
    20,331.10/28,054.47 = 11,377.90/x
  3. Step 3: Cross multiply
    20,331.10x = 28,054.47 × 11,377.90
  4. Step 4: Simplify right side
    20,331.10x = 319,200,954.21
  5. Step 5: Solve for x
    x = 319,200,954.21/20,331.10
  6. Step 6: Final answer
    x = 15,700.13

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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.