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Finding the Fourth Proportional to 15,000.28, 20,700.93 and 8,712.34

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Solution

The fourth proportional to 15,000.28, 20,700.93 and 8,712.34 is: 12,023.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.28 : 20,700.93 = 8,712.34 : x
  2. Step 2: Convert to fraction form
    15,000.28/20,700.93 = 8,712.34/x
  3. Step 3: Cross multiply
    15,000.28x = 20,700.93 × 8,712.34
  4. Step 4: Simplify right side
    15,000.28x = 180,353,540.48
  5. Step 5: Solve for x
    x = 180,353,540.48/15,000.28
  6. Step 6: Final answer
    x = 12,023.34

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1.5x scale

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.