Home / 9,412.90-12,989.24-5,221.15

Finding the Fourth Proportional to 9,412.90, 12,989.24 and 5,221.15

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Solution

The fourth proportional to 9,412.90, 12,989.24 and 5,221.15 is: 7,204.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,412.90 : 12,989.24 = 5,221.15 : x
  2. Step 2: Convert to fraction form
    9,412.90/12,989.24 = 5,221.15/x
  3. Step 3: Cross multiply
    9,412.90x = 12,989.24 × 5,221.15
  4. Step 4: Simplify right side
    9,412.90x = 67,818,744.32
  5. Step 5: Solve for x
    x = 67,818,744.32/9,412.90
  6. Step 6: Final answer
    x = 7,204.87

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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.