Home / 31,459.48-47,189.60-8,085.28

Finding the Fourth Proportional to 31,459.48, 47,189.60 and 8,085.28

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Solution

The fourth proportional to 31,459.48, 47,189.60 and 8,085.28 is: 12,128.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,459.48 : 47,189.60 = 8,085.28 : x
  2. Step 2: Convert to fraction form
    31,459.48/47,189.60 = 8,085.28/x
  3. Step 3: Cross multiply
    31,459.48x = 47,189.60 × 8,085.28
  4. Step 4: Simplify right side
    31,459.48x = 381,541,129.09
  5. Step 5: Solve for x
    x = 381,541,129.09/31,459.48
  6. Step 6: Final answer
    x = 12,128.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.