Home / 28,520.39-42,715.98-13,739.91

Finding the Fourth Proportional to 28,520.39, 42,715.98 and 13,739.91

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Solution

The fourth proportional to 28,520.39, 42,715.98 and 13,739.91 is: 20,578.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.39 : 42,715.98 = 13,739.91 : x
  2. Step 2: Convert to fraction form
    28,520.39/42,715.98 = 13,739.91/x
  3. Step 3: Cross multiply
    28,520.39x = 42,715.98 × 13,739.91
  4. Step 4: Simplify right side
    28,520.39x = 586,913,720.76
  5. Step 5: Solve for x
    x = 586,913,720.76/28,520.39
  6. Step 6: Final answer
    x = 20,578.74

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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.