Home / 28,279.40-42,392.10-10,505.30

Finding the Fourth Proportional to 28,279.40, 42,392.10 and 10,505.30

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Solution

The fourth proportional to 28,279.40, 42,392.10 and 10,505.30 is: 15,747.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.40 : 42,392.10 = 10,505.30 : x
  2. Step 2: Convert to fraction form
    28,279.40/42,392.10 = 10,505.30/x
  3. Step 3: Cross multiply
    28,279.40x = 42,392.10 × 10,505.30
  4. Step 4: Simplify right side
    28,279.40x = 445,341,728.13
  5. Step 5: Solve for x
    x = 445,341,728.13/28,279.40
  6. Step 6: Final answer
    x = 15,747.92

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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.