Home / 21,306.20-31,959.30-5,725.40

Finding the Fourth Proportional to 21,306.20, 31,959.30 and 5,725.40

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Solution

The fourth proportional to 21,306.20, 31,959.30 and 5,725.40 is: 8,588.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.20 : 31,959.30 = 5,725.40 : x
  2. Step 2: Convert to fraction form
    21,306.20/31,959.30 = 5,725.40/x
  3. Step 3: Cross multiply
    21,306.20x = 31,959.30 × 5,725.40
  4. Step 4: Simplify right side
    21,306.20x = 182,979,776.22
  5. Step 5: Solve for x
    x = 182,979,776.22/21,306.20
  6. Step 6: Final answer
    x = 8,588.10

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1.5x scale

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.