Home / 31,921.60-47,885.76-11,145.28

Finding the Fourth Proportional to 31,921.60, 47,885.76 and 11,145.28

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Solution

The fourth proportional to 31,921.60, 47,885.76 and 11,145.28 is: 16,719.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,921.60 : 47,885.76 = 11,145.28 : x
  2. Step 2: Convert to fraction form
    31,921.60/47,885.76 = 11,145.28/x
  3. Step 3: Cross multiply
    31,921.60x = 47,885.76 × 11,145.28
  4. Step 4: Simplify right side
    31,921.60x = 533,700,203.21
  5. Step 5: Solve for x
    x = 533,700,203.21/31,921.60
  6. Step 6: Final answer
    x = 16,719.09

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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.