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Finding the Fourth Proportional to 16,871.40, 25,322.40 and 8,557.20

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Solution

The fourth proportional to 16,871.40, 25,322.40 and 8,557.20 is: 12,843.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,871.40 : 25,322.40 = 8,557.20 : x
  2. Step 2: Convert to fraction form
    16,871.40/25,322.40 = 8,557.20/x
  3. Step 3: Cross multiply
    16,871.40x = 25,322.40 × 8,557.20
  4. Step 4: Simplify right side
    16,871.40x = 216,688,841.28
  5. Step 5: Solve for x
    x = 216,688,841.28/16,871.40
  6. Step 6: Final answer
    x = 12,843.56

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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.