Home / 15,531.64-21,434.16-8,817.56

Finding the Fourth Proportional to 15,531.64, 21,434.16 and 8,817.56

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Solution

The fourth proportional to 15,531.64, 21,434.16 and 8,817.56 is: 12,168.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,531.64 : 21,434.16 = 8,817.56 : x
  2. Step 2: Convert to fraction form
    15,531.64/21,434.16 = 8,817.56/x
  3. Step 3: Cross multiply
    15,531.64x = 21,434.16 × 8,817.56
  4. Step 4: Simplify right side
    15,531.64x = 188,996,991.85
  5. Step 5: Solve for x
    x = 188,996,991.85/15,531.64
  6. Step 6: Final answer
    x = 12,168.51

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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.