Home / 8,987.31-12,402.45-5,212.66

Finding the Fourth Proportional to 8,987.31, 12,402.45 and 5,212.66

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Solution

The fourth proportional to 8,987.31, 12,402.45 and 5,212.66 is: 7,193.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.31 : 12,402.45 = 5,212.66 : x
  2. Step 2: Convert to fraction form
    8,987.31/12,402.45 = 5,212.66/x
  3. Step 3: Cross multiply
    8,987.31x = 12,402.45 × 5,212.66
  4. Step 4: Simplify right side
    8,987.31x = 64,649,755.02
  5. Step 5: Solve for x
    x = 64,649,755.02/8,987.31
  6. Step 6: Final answer
    x = 7,193.45

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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.