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Finding the Fourth Proportional to 28,279.76, 42,406.14 and 10,504.76

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Solution

The fourth proportional to 28,279.76, 42,406.14 and 10,504.76 is: 15,752.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.76 : 42,406.14 = 10,504.76 : x
  2. Step 2: Convert to fraction form
    28,279.76/42,406.14 = 10,504.76/x
  3. Step 3: Cross multiply
    28,279.76x = 42,406.14 × 10,504.76
  4. Step 4: Simplify right side
    28,279.76x = 445,466,323.23
  5. Step 5: Solve for x
    x = 445,466,323.23/28,279.76
  6. Step 6: Final answer
    x = 15,752.13

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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.