Home / 20,531.19-28,332.95-11,099.76

Finding the Fourth Proportional to 20,531.19, 28,332.95 and 11,099.76

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Solution

The fourth proportional to 20,531.19, 28,332.95 and 11,099.76 is: 15,317.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.19 : 28,332.95 = 11,099.76 : x
  2. Step 2: Convert to fraction form
    20,531.19/28,332.95 = 11,099.76/x
  3. Step 3: Cross multiply
    20,531.19x = 28,332.95 × 11,099.76
  4. Step 4: Simplify right side
    20,531.19x = 314,488,945.09
  5. Step 5: Solve for x
    x = 314,488,945.09/20,531.19
  6. Step 6: Final answer
    x = 15,317.62

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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.