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Finding the Fourth Proportional to 17,285.76, 25,931.16 and 8,521.20

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Solution

The fourth proportional to 17,285.76, 25,931.16 and 8,521.20 is: 12,783.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,285.76 : 25,931.16 = 8,521.20 : x
  2. Step 2: Convert to fraction form
    17,285.76/25,931.16 = 8,521.20/x
  3. Step 3: Cross multiply
    17,285.76x = 25,931.16 × 8,521.20
  4. Step 4: Simplify right side
    17,285.76x = 220,964,600.59
  5. Step 5: Solve for x
    x = 220,964,600.59/17,285.76
  6. Step 6: Final answer
    x = 12,783.04

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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.