Home / 20,881-28,829.22-18,639.04

Finding the Fourth Proportional to 20,881, 28,829.22 and 18,639.04

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Solution

The fourth proportional to 20,881, 28,829.22 and 18,639.04 is: 25,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881 : 28,829.22 = 18,639.04 : x
  2. Step 2: Convert to fraction form
    20,881/28,829.22 = 18,639.04/x
  3. Step 3: Cross multiply
    20,881x = 28,829.22 × 18,639.04
  4. Step 4: Simplify right side
    20,881x = 537,348,984.75
  5. Step 5: Solve for x
    x = 537,348,984.75/20,881
  6. Step 6: Final answer
    x = 25,733.87

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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.