Home / 28,311.80-42,468.64-12,729.46

Finding the Fourth Proportional to 28,311.80, 42,468.64 and 12,729.46

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Solution

The fourth proportional to 28,311.80, 42,468.64 and 12,729.46 is: 19,094.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.80 : 42,468.64 = 12,729.46 : x
  2. Step 2: Convert to fraction form
    28,311.80/42,468.64 = 12,729.46/x
  3. Step 3: Cross multiply
    28,311.80x = 42,468.64 × 12,729.46
  4. Step 4: Simplify right side
    28,311.80x = 540,602,854.13
  5. Step 5: Solve for x
    x = 540,602,854.13/28,311.80
  6. Step 6: Final answer
    x = 19,094.61

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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.