Home / 11,989.80-16,545.15-6,684.30

Finding the Fourth Proportional to 11,989.80, 16,545.15 and 6,684.30

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Solution

The fourth proportional to 11,989.80, 16,545.15 and 6,684.30 is: 9,223.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,989.80 : 16,545.15 = 6,684.30 : x
  2. Step 2: Convert to fraction form
    11,989.80/16,545.15 = 6,684.30/x
  3. Step 3: Cross multiply
    11,989.80x = 16,545.15 × 6,684.30
  4. Step 4: Simplify right side
    11,989.80x = 110,592,746.15
  5. Step 5: Solve for x
    x = 110,592,746.15/11,989.80
  6. Step 6: Final answer
    x = 9,223.90

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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.