Home / 20,560.59-28,378.94-13,408.35

Finding the Fourth Proportional to 20,560.59, 28,378.94 and 13,408.35

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Solution

The fourth proportional to 20,560.59, 28,378.94 and 13,408.35 is: 18,506.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.59 : 28,378.94 = 13,408.35 : x
  2. Step 2: Convert to fraction form
    20,560.59/28,378.94 = 13,408.35/x
  3. Step 3: Cross multiply
    20,560.59x = 28,378.94 × 13,408.35
  4. Step 4: Simplify right side
    20,560.59x = 380,514,693.11
  5. Step 5: Solve for x
    x = 380,514,693.11/20,560.59
  6. Step 6: Final answer
    x = 18,506.99

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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.