Home / 15,489.38-21,374.70-8,415.62

Finding the Fourth Proportional to 15,489.38, 21,374.70 and 8,415.62

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Solution

The fourth proportional to 15,489.38, 21,374.70 and 8,415.62 is: 11,613.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.38 : 21,374.70 = 8,415.62 : x
  2. Step 2: Convert to fraction form
    15,489.38/21,374.70 = 8,415.62/x
  3. Step 3: Cross multiply
    15,489.38x = 21,374.70 × 8,415.62
  4. Step 4: Simplify right side
    15,489.38x = 179,881,352.81
  5. Step 5: Solve for x
    x = 179,881,352.81/15,489.38
  6. Step 6: Final answer
    x = 11,613.21

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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.