Home / 15,531.19-21,433.61-8,458.13

Finding the Fourth Proportional to 15,531.19, 21,433.61 and 8,458.13

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Solution

The fourth proportional to 15,531.19, 21,433.61 and 8,458.13 is: 11,672.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.19 : 21,433.61 = 8,458.13 : x
  2. Step 2: Convert to fraction form
    15,531.19/21,433.61 = 8,458.13/x
  3. Step 3: Cross multiply
    15,531.19x = 21,433.61 × 8,458.13
  4. Step 4: Simplify right side
    15,531.19x = 181,288,259.75
  5. Step 5: Solve for x
    x = 181,288,259.75/15,531.19
  6. Step 6: Final answer
    x = 11,672.53

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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.