Home / 21,268.86-29,359.04-15,978.96

Finding the Fourth Proportional to 21,268.86, 29,359.04 and 15,978.96

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Solution

The fourth proportional to 21,268.86, 29,359.04 and 15,978.96 is: 22,056.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.86 : 29,359.04 = 15,978.96 : x
  2. Step 2: Convert to fraction form
    21,268.86/29,359.04 = 15,978.96/x
  3. Step 3: Cross multiply
    21,268.86x = 29,359.04 × 15,978.96
  4. Step 4: Simplify right side
    21,268.86x = 469,126,925.80
  5. Step 5: Solve for x
    x = 469,126,925.80/21,268.86
  6. Step 6: Final answer
    x = 22,056.98

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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.