Home / 12,641.05-18,932.01-9,990.77

Finding the Fourth Proportional to 12,641.05, 18,932.01 and 9,990.77

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Solution

The fourth proportional to 12,641.05, 18,932.01 and 9,990.77 is: 14,962.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,641.05 : 18,932.01 = 9,990.77 : x
  2. Step 2: Convert to fraction form
    12,641.05/18,932.01 = 9,990.77/x
  3. Step 3: Cross multiply
    12,641.05x = 18,932.01 × 9,990.77
  4. Step 4: Simplify right side
    12,641.05x = 189,145,225.42
  5. Step 5: Solve for x
    x = 189,145,225.42/12,641.05
  6. Step 6: Final answer
    x = 14,962.78

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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.