Home / 20,530.80-30,787.97-8,690.00

Finding the Fourth Proportional to 20,530.80, 30,787.97 and 8,690.00

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Solution

The fourth proportional to 20,530.80, 30,787.97 and 8,690.00 is: 13,031.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.80 : 30,787.97 = 8,690.00 : x
  2. Step 2: Convert to fraction form
    20,530.80/30,787.97 = 8,690.00/x
  3. Step 3: Cross multiply
    20,530.80x = 30,787.97 × 8,690.00
  4. Step 4: Simplify right side
    20,530.80x = 267,547,261.91
  5. Step 5: Solve for x
    x = 267,547,261.91/20,530.80
  6. Step 6: Final answer
    x = 13,031.51

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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.