Home / 13,356.52-20,046.88-7,121.76

Finding the Fourth Proportional to 13,356.52, 20,046.88 and 7,121.76

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Solution

The fourth proportional to 13,356.52, 20,046.88 and 7,121.76 is: 10,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.52 : 20,046.88 = 7,121.76 : x
  2. Step 2: Convert to fraction form
    13,356.52/20,046.88 = 7,121.76/x
  3. Step 3: Cross multiply
    13,356.52x = 20,046.88 × 7,121.76
  4. Step 4: Simplify right side
    13,356.52x = 142,769,068.11
  5. Step 5: Solve for x
    x = 142,769,068.11/13,356.52
  6. Step 6: Final answer
    x = 10,689.09

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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.