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Finding the Fourth Proportional to 28,642.41, 42,930.81 and 15,505.83

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Solution

The fourth proportional to 28,642.41, 42,930.81 and 15,505.83 is: 23,240.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,642.41 : 42,930.81 = 15,505.83 : x
  2. Step 2: Convert to fraction form
    28,642.41/42,930.81 = 15,505.83/x
  3. Step 3: Cross multiply
    28,642.41x = 42,930.81 × 15,505.83
  4. Step 4: Simplify right side
    28,642.41x = 665,677,841.62
  5. Step 5: Solve for x
    x = 665,677,841.62/28,642.41
  6. Step 6: Final answer
    x = 23,240.99

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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.