Home / 28,954.32-39,981.90-18,217.10

Finding the Fourth Proportional to 28,954.32, 39,981.90 and 18,217.10

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Solution

The fourth proportional to 28,954.32, 39,981.90 and 18,217.10 is: 25,155.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,954.32 : 39,981.90 = 18,217.10 : x
  2. Step 2: Convert to fraction form
    28,954.32/39,981.90 = 18,217.10/x
  3. Step 3: Cross multiply
    28,954.32x = 39,981.90 × 18,217.10
  4. Step 4: Simplify right side
    28,954.32x = 728,354,070.58
  5. Step 5: Solve for x
    x = 728,354,070.58/28,954.32
  6. Step 6: Final answer
    x = 25,155.28

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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.