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Finding the Fourth Proportional to 15,999.40, 22,079.84 and 8,925.80

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Solution

The fourth proportional to 15,999.40, 22,079.84 and 8,925.80 is: 12,317.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.40 : 22,079.84 = 8,925.80 : x
  2. Step 2: Convert to fraction form
    15,999.40/22,079.84 = 8,925.80/x
  3. Step 3: Cross multiply
    15,999.40x = 22,079.84 × 8,925.80
  4. Step 4: Simplify right side
    15,999.40x = 197,080,235.87
  5. Step 5: Solve for x
    x = 197,080,235.87/15,999.40
  6. Step 6: Final answer
    x = 12,317.98

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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.