Home / 2,931.60-4,392-2,691.12

Finding the Fourth Proportional to 2,931.60, 4,392 and 2,691.12

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Solution

The fourth proportional to 2,931.60, 4,392 and 2,691.12 is: 4,031.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.60 : 4,392 = 2,691.12 : x
  2. Step 2: Convert to fraction form
    2,931.60/4,392 = 2,691.12/x
  3. Step 3: Cross multiply
    2,931.60x = 4,392 × 2,691.12
  4. Step 4: Simplify right side
    2,931.60x = 11,819,399.04
  5. Step 5: Solve for x
    x = 11,819,399.04/2,931.60
  6. Step 6: Final answer
    x = 4,031.72

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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.