Home / 13,356.48-20,046.90-7,121.76

Finding the Fourth Proportional to 13,356.48, 20,046.90 and 7,121.76

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Solution

The fourth proportional to 13,356.48, 20,046.90 and 7,121.76 is: 10,689.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.48 : 20,046.90 = 7,121.76 : x
  2. Step 2: Convert to fraction form
    13,356.48/20,046.90 = 7,121.76/x
  3. Step 3: Cross multiply
    13,356.48x = 20,046.90 × 7,121.76
  4. Step 4: Simplify right side
    13,356.48x = 142,769,210.54
  5. Step 5: Solve for x
    x = 142,769,210.54/13,356.48
  6. Step 6: Final answer
    x = 10,689.13

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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.