Home / 20,847.19-28,773.59-13,291.78

Finding the Fourth Proportional to 20,847.19, 28,773.59 and 13,291.78

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Solution

The fourth proportional to 20,847.19, 28,773.59 and 13,291.78 is: 18,345.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.19 : 28,773.59 = 13,291.78 : x
  2. Step 2: Convert to fraction form
    20,847.19/28,773.59 = 13,291.78/x
  3. Step 3: Cross multiply
    20,847.19x = 28,773.59 × 13,291.78
  4. Step 4: Simplify right side
    20,847.19x = 382,452,089.70
  5. Step 5: Solve for x
    x = 382,452,089.70/20,847.19
  6. Step 6: Final answer
    x = 18,345.50

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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.