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Finding the Fourth Proportional to 20,507.70, 30,775.95 and 8,829.30

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Solution

The fourth proportional to 20,507.70, 30,775.95 and 8,829.30 is: 13,250.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.70 : 30,775.95 = 8,829.30 : x
  2. Step 2: Convert to fraction form
    20,507.70/30,775.95 = 8,829.30/x
  3. Step 3: Cross multiply
    20,507.70x = 30,775.95 × 8,829.30
  4. Step 4: Simplify right side
    20,507.70x = 271,730,095.34
  5. Step 5: Solve for x
    x = 271,730,095.34/20,507.70
  6. Step 6: Final answer
    x = 13,250.15

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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.