Home / 15,319.40-21,139.98-8,605.31

Finding the Fourth Proportional to 15,319.40, 21,139.98 and 8,605.31

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Solution

The fourth proportional to 15,319.40, 21,139.98 and 8,605.31 is: 11,874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.40 : 21,139.98 = 8,605.31 : x
  2. Step 2: Convert to fraction form
    15,319.40/21,139.98 = 8,605.31/x
  3. Step 3: Cross multiply
    15,319.40x = 21,139.98 × 8,605.31
  4. Step 4: Simplify right side
    15,319.40x = 181,916,081.29
  5. Step 5: Solve for x
    x = 181,916,081.29/15,319.40
  6. Step 6: Final answer
    x = 11,874.88

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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.