Home / 20,440.42-28,210.12-11,366.69

Finding the Fourth Proportional to 20,440.42, 28,210.12 and 11,366.69

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Solution

The fourth proportional to 20,440.42, 28,210.12 and 11,366.69 is: 15,687.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.42 : 28,210.12 = 11,366.69 : x
  2. Step 2: Convert to fraction form
    20,440.42/28,210.12 = 11,366.69/x
  3. Step 3: Cross multiply
    20,440.42x = 28,210.12 × 11,366.69
  4. Step 4: Simplify right side
    20,440.42x = 320,655,572.33
  5. Step 5: Solve for x
    x = 320,655,572.33/20,440.42
  6. Step 6: Final answer
    x = 15,687.33

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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.