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Finding the Fourth Proportional to 15,200.72, 20,977.08 and 8,913.20

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Solution

The fourth proportional to 15,200.72, 20,977.08 and 8,913.20 is: 12,300.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,200.72 : 20,977.08 = 8,913.20 : x
  2. Step 2: Convert to fraction form
    15,200.72/20,977.08 = 8,913.20/x
  3. Step 3: Cross multiply
    15,200.72x = 20,977.08 × 8,913.20
  4. Step 4: Simplify right side
    15,200.72x = 186,972,909.46
  5. Step 5: Solve for x
    x = 186,972,909.46/15,200.72
  6. Step 6: Final answer
    x = 12,300.27

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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.