Home / 20,687.12-28,550.76-12,303.44

Finding the Fourth Proportional to 20,687.12, 28,550.76 and 12,303.44

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Solution

The fourth proportional to 20,687.12, 28,550.76 and 12,303.44 is: 16,980.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.12 : 28,550.76 = 12,303.44 : x
  2. Step 2: Convert to fraction form
    20,687.12/28,550.76 = 12,303.44/x
  3. Step 3: Cross multiply
    20,687.12x = 28,550.76 × 12,303.44
  4. Step 4: Simplify right side
    20,687.12x = 351,272,562.61
  5. Step 5: Solve for x
    x = 351,272,562.61/20,687.12
  6. Step 6: Final answer
    x = 16,980.25

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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.