Home / 15,605.12-21,535.20-8,531.68

Finding the Fourth Proportional to 15,605.12, 21,535.20 and 8,531.68

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Solution

The fourth proportional to 15,605.12, 21,535.20 and 8,531.68 is: 11,773.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.12 : 21,535.20 = 8,531.68 : x
  2. Step 2: Convert to fraction form
    15,605.12/21,535.20 = 8,531.68/x
  3. Step 3: Cross multiply
    15,605.12x = 21,535.20 × 8,531.68
  4. Step 4: Simplify right side
    15,605.12x = 183,731,435.14
  5. Step 5: Solve for x
    x = 183,731,435.14/15,605.12
  6. Step 6: Final answer
    x = 11,773.79

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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.