Home / 20,890.17-28,827.50-11,458.53

Finding the Fourth Proportional to 20,890.17, 28,827.50 and 11,458.53

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Solution

The fourth proportional to 20,890.17, 28,827.50 and 11,458.53 is: 15,812.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.17 : 28,827.50 = 11,458.53 : x
  2. Step 2: Convert to fraction form
    20,890.17/28,827.50 = 11,458.53/x
  3. Step 3: Cross multiply
    20,890.17x = 28,827.50 × 11,458.53
  4. Step 4: Simplify right side
    20,890.17x = 330,320,716.28
  5. Step 5: Solve for x
    x = 330,320,716.28/20,890.17
  6. Step 6: Final answer
    x = 15,812.26

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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.