Home / 15,319.38-21,142.72-8,605.00

Finding the Fourth Proportional to 15,319.38, 21,142.72 and 8,605.00

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Solution

The fourth proportional to 15,319.38, 21,142.72 and 8,605.00 is: 11,876.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.38 : 21,142.72 = 8,605.00 : x
  2. Step 2: Convert to fraction form
    15,319.38/21,142.72 = 8,605.00/x
  3. Step 3: Cross multiply
    15,319.38x = 21,142.72 × 8,605.00
  4. Step 4: Simplify right side
    15,319.38x = 181,933,175.86
  5. Step 5: Solve for x
    x = 181,933,175.86/15,319.38
  6. Step 6: Final answer
    x = 11,876.01

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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.