Home / 15,405.31-21,259.43-8,331.72

Finding the Fourth Proportional to 15,405.31, 21,259.43 and 8,331.72

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Solution

The fourth proportional to 15,405.31, 21,259.43 and 8,331.72 is: 11,497.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.31 : 21,259.43 = 8,331.72 : x
  2. Step 2: Convert to fraction form
    15,405.31/21,259.43 = 8,331.72/x
  3. Step 3: Cross multiply
    15,405.31x = 21,259.43 × 8,331.72
  4. Step 4: Simplify right side
    15,405.31x = 177,127,618.12
  5. Step 5: Solve for x
    x = 177,127,618.12/15,405.31
  6. Step 6: Final answer
    x = 11,497.83

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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.