Home / 20,440.80-28,128.60-18,088.56

Finding the Fourth Proportional to 20,440.80, 28,128.60 and 18,088.56

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Solution

The fourth proportional to 20,440.80, 28,128.60 and 18,088.56 is: 24,891.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.80 : 28,128.60 = 18,088.56 : x
  2. Step 2: Convert to fraction form
    20,440.80/28,128.60 = 18,088.56/x
  3. Step 3: Cross multiply
    20,440.80x = 28,128.60 × 18,088.56
  4. Step 4: Simplify right side
    20,440.80x = 508,805,868.82
  5. Step 5: Solve for x
    x = 508,805,868.82/20,440.80
  6. Step 6: Final answer
    x = 24,891.68

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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.