Home / 20,454.18-30,649.84-12,117.61

Finding the Fourth Proportional to 20,454.18, 30,649.84 and 12,117.61

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Solution

The fourth proportional to 20,454.18, 30,649.84 and 12,117.61 is: 18,157.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.18 : 30,649.84 = 12,117.61 : x
  2. Step 2: Convert to fraction form
    20,454.18/30,649.84 = 12,117.61/x
  3. Step 3: Cross multiply
    20,454.18x = 30,649.84 × 12,117.61
  4. Step 4: Simplify right side
    20,454.18x = 371,402,807.68
  5. Step 5: Solve for x
    x = 371,402,807.68/20,454.18
  6. Step 6: Final answer
    x = 18,157.80

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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.