Home / 20,631.04-28,473.60-13,081.12

Finding the Fourth Proportional to 20,631.04, 28,473.60 and 13,081.12

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Solution

The fourth proportional to 20,631.04, 28,473.60 and 13,081.12 is: 18,053.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.04 : 28,473.60 = 13,081.12 : x
  2. Step 2: Convert to fraction form
    20,631.04/28,473.60 = 13,081.12/x
  3. Step 3: Cross multiply
    20,631.04x = 28,473.60 × 13,081.12
  4. Step 4: Simplify right side
    20,631.04x = 372,466,578.43
  5. Step 5: Solve for x
    x = 372,466,578.43/20,631.04
  6. Step 6: Final answer
    x = 18,053.70

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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.