Home / 20,648.40-28,482.04-18,128.56

Finding the Fourth Proportional to 20,648.40, 28,482.04 and 18,128.56

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Solution

The fourth proportional to 20,648.40, 28,482.04 and 18,128.56 is: 25,006.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.40 : 28,482.04 = 18,128.56 : x
  2. Step 2: Convert to fraction form
    20,648.40/28,482.04 = 18,128.56/x
  3. Step 3: Cross multiply
    20,648.40x = 28,482.04 × 18,128.56
  4. Step 4: Simplify right side
    20,648.40x = 516,338,371.06
  5. Step 5: Solve for x
    x = 516,338,371.06/20,648.40
  6. Step 6: Final answer
    x = 25,006.22

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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.