Home / 15,356.13-21,191.54-8,641.86

Finding the Fourth Proportional to 15,356.13, 21,191.54 and 8,641.86

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Solution

The fourth proportional to 15,356.13, 21,191.54 and 8,641.86 is: 11,925.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,356.13 : 21,191.54 = 8,641.86 : x
  2. Step 2: Convert to fraction form
    15,356.13/21,191.54 = 8,641.86/x
  3. Step 3: Cross multiply
    15,356.13x = 21,191.54 × 8,641.86
  4. Step 4: Simplify right side
    15,356.13x = 183,134,278.66
  5. Step 5: Solve for x
    x = 183,134,278.66/15,356.13
  6. Step 6: Final answer
    x = 11,925.81

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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.