Home / 20,853.65-28,778.63-12,677.24

Finding the Fourth Proportional to 20,853.65, 28,778.63 and 12,677.24

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Solution

The fourth proportional to 20,853.65, 28,778.63 and 12,677.24 is: 17,494.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.65 : 28,778.63 = 12,677.24 : x
  2. Step 2: Convert to fraction form
    20,853.65/28,778.63 = 12,677.24/x
  3. Step 3: Cross multiply
    20,853.65x = 28,778.63 × 12,677.24
  4. Step 4: Simplify right side
    20,853.65x = 364,833,607.94
  5. Step 5: Solve for x
    x = 364,833,607.94/20,853.65
  6. Step 6: Final answer
    x = 17,494.95

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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.