Home / 20,920.07-28,861.35-13,364.44

Finding the Fourth Proportional to 20,920.07, 28,861.35 and 13,364.44

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Solution

The fourth proportional to 20,920.07, 28,861.35 and 13,364.44 is: 18,437.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.07 : 28,861.35 = 13,364.44 : x
  2. Step 2: Convert to fraction form
    20,920.07/28,861.35 = 13,364.44/x
  3. Step 3: Cross multiply
    20,920.07x = 28,861.35 × 13,364.44
  4. Step 4: Simplify right side
    20,920.07x = 385,715,569.27
  5. Step 5: Solve for x
    x = 385,715,569.27/20,920.07
  6. Step 6: Final answer
    x = 18,437.59

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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.