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Finding the Fourth Proportional to 18,761.00, 28,139.51 and 9,872.77

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Solution

The fourth proportional to 18,761.00, 28,139.51 and 9,872.77 is: 14,808.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.00 : 28,139.51 = 9,872.77 : x
  2. Step 2: Convert to fraction form
    18,761.00/28,139.51 = 9,872.77/x
  3. Step 3: Cross multiply
    18,761.00x = 28,139.51 × 9,872.77
  4. Step 4: Simplify right side
    18,761.00x = 277,814,871.76
  5. Step 5: Solve for x
    x = 277,814,871.76/18,761.00
  6. Step 6: Final answer
    x = 14,808.11

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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.