Home / 20,531.13-28,332.95-11,099.69

Finding the Fourth Proportional to 20,531.13, 28,332.95 and 11,099.69

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Solution

The fourth proportional to 20,531.13, 28,332.95 and 11,099.69 is: 15,317.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.13 : 28,332.95 = 11,099.69 : x
  2. Step 2: Convert to fraction form
    20,531.13/28,332.95 = 11,099.69/x
  3. Step 3: Cross multiply
    20,531.13x = 28,332.95 × 11,099.69
  4. Step 4: Simplify right side
    20,531.13x = 314,486,961.79
  5. Step 5: Solve for x
    x = 314,486,961.79/20,531.13
  6. Step 6: Final answer
    x = 15,317.57

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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.