Home / 15,844.30-21,865.65-9,129.40

Finding the Fourth Proportional to 15,844.30, 21,865.65 and 9,129.40

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Solution

The fourth proportional to 15,844.30, 21,865.65 and 9,129.40 is: 12,598.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,844.30 : 21,865.65 = 9,129.40 : x
  2. Step 2: Convert to fraction form
    15,844.30/21,865.65 = 9,129.40/x
  3. Step 3: Cross multiply
    15,844.30x = 21,865.65 × 9,129.40
  4. Step 4: Simplify right side
    15,844.30x = 199,620,265.11
  5. Step 5: Solve for x
    x = 199,620,265.11/15,844.30
  6. Step 6: Final answer
    x = 12,598.87

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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.