Home / 9,388.40-14,147.18-7,781.12

Finding the Fourth Proportional to 9,388.40, 14,147.18 and 7,781.12

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Solution

The fourth proportional to 9,388.40, 14,147.18 and 7,781.12 is: 11,725.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,388.40 : 14,147.18 = 7,781.12 : x
  2. Step 2: Convert to fraction form
    9,388.40/14,147.18 = 7,781.12/x
  3. Step 3: Cross multiply
    9,388.40x = 14,147.18 × 7,781.12
  4. Step 4: Simplify right side
    9,388.40x = 110,080,905.24
  5. Step 5: Solve for x
    x = 110,080,905.24/9,388.40
  6. Step 6: Final answer
    x = 11,725.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.