Home / 21,307.20-31,959.72-5,724.96

Finding the Fourth Proportional to 21,307.20, 31,959.72 and 5,724.96

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Solution

The fourth proportional to 21,307.20, 31,959.72 and 5,724.96 is: 8,587.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.20 : 31,959.72 = 5,724.96 : x
  2. Step 2: Convert to fraction form
    21,307.20/31,959.72 = 5,724.96/x
  3. Step 3: Cross multiply
    21,307.20x = 31,959.72 × 5,724.96
  4. Step 4: Simplify right side
    21,307.20x = 182,968,118.61
  5. Step 5: Solve for x
    x = 182,968,118.61/21,307.20
  6. Step 6: Final answer
    x = 8,587.15

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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.