Home / 15,311.43-21,129.53-8,597.07

Finding the Fourth Proportional to 15,311.43, 21,129.53 and 8,597.07

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Solution

The fourth proportional to 15,311.43, 21,129.53 and 8,597.07 is: 11,863.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.43 : 21,129.53 = 8,597.07 : x
  2. Step 2: Convert to fraction form
    15,311.43/21,129.53 = 8,597.07/x
  3. Step 3: Cross multiply
    15,311.43x = 21,129.53 × 8,597.07
  4. Step 4: Simplify right side
    15,311.43x = 181,652,005.49
  5. Step 5: Solve for x
    x = 181,652,005.49/15,311.43
  6. Step 6: Final answer
    x = 11,863.82

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Double scale
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Similar ratio
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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.