Home / 9,781.20-14,666.40-3,931.20

Finding the Fourth Proportional to 9,781.20, 14,666.40 and 3,931.20

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Solution

The fourth proportional to 9,781.20, 14,666.40 and 3,931.20 is: 5,894.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,781.20 : 14,666.40 = 3,931.20 : x
  2. Step 2: Convert to fraction form
    9,781.20/14,666.40 = 3,931.20/x
  3. Step 3: Cross multiply
    9,781.20x = 14,666.40 × 3,931.20
  4. Step 4: Simplify right side
    9,781.20x = 57,656,551.68
  5. Step 5: Solve for x
    x = 57,656,551.68/9,781.20
  6. Step 6: Final answer
    x = 5,894.63

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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.