Home / 20,597.18-28,424-11,165.72

Finding the Fourth Proportional to 20,597.18, 28,424 and 11,165.72

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Solution

The fourth proportional to 20,597.18, 28,424 and 11,165.72 is: 15,408.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,597.18 : 28,424 = 11,165.72 : x
  2. Step 2: Convert to fraction form
    20,597.18/28,424 = 11,165.72/x
  3. Step 3: Cross multiply
    20,597.18x = 28,424 × 11,165.72
  4. Step 4: Simplify right side
    20,597.18x = 317,374,425.28
  5. Step 5: Solve for x
    x = 317,374,425.28/20,597.18
  6. Step 6: Final answer
    x = 15,408.63

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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.