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Finding the Fourth Proportional to 53,311.86, 79,967.90 and 13,868.91

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Solution

The fourth proportional to 53,311.86, 79,967.90 and 13,868.91 is: 20,803.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,311.86 : 79,967.90 = 13,868.91 : x
  2. Step 2: Convert to fraction form
    53,311.86/79,967.90 = 13,868.91/x
  3. Step 3: Cross multiply
    53,311.86x = 79,967.90 × 13,868.91
  4. Step 4: Simplify right side
    53,311.86x = 1,109,067,538.64
  5. Step 5: Solve for x
    x = 1,109,067,538.64/53,311.86
  6. Step 6: Final answer
    x = 20,803.39

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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.