Home / 20,442.09-28,210.89-11,489.57

Finding the Fourth Proportional to 20,442.09, 28,210.89 and 11,489.57

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Solution

The fourth proportional to 20,442.09, 28,210.89 and 11,489.57 is: 15,856.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.09 : 28,210.89 = 11,489.57 : x
  2. Step 2: Convert to fraction form
    20,442.09/28,210.89 = 11,489.57/x
  3. Step 3: Cross multiply
    20,442.09x = 28,210.89 × 11,489.57
  4. Step 4: Simplify right side
    20,442.09x = 324,130,854.36
  5. Step 5: Solve for x
    x = 324,130,854.36/20,442.09
  6. Step 6: Final answer
    x = 15,856.05

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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.