Home / 11,979.18-16,491.33-8,990.01

Finding the Fourth Proportional to 11,979.18, 16,491.33 and 8,990.01

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Solution

The fourth proportional to 11,979.18, 16,491.33 and 8,990.01 is: 12,376.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,979.18 : 16,491.33 = 8,990.01 : x
  2. Step 2: Convert to fraction form
    11,979.18/16,491.33 = 8,990.01/x
  3. Step 3: Cross multiply
    11,979.18x = 16,491.33 × 8,990.01
  4. Step 4: Simplify right side
    11,979.18x = 148,257,221.61
  5. Step 5: Solve for x
    x = 148,257,221.61/11,979.18
  6. Step 6: Final answer
    x = 12,376.24

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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.