Home / 20,617.68-28,439.74-18,219.96

Finding the Fourth Proportional to 20,617.68, 28,439.74 and 18,219.96

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Solution

The fourth proportional to 20,617.68, 28,439.74 and 18,219.96 is: 25,132.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.68 : 28,439.74 = 18,219.96 : x
  2. Step 2: Convert to fraction form
    20,617.68/28,439.74 = 18,219.96/x
  3. Step 3: Cross multiply
    20,617.68x = 28,439.74 × 18,219.96
  4. Step 4: Simplify right side
    20,617.68x = 518,170,925.21
  5. Step 5: Solve for x
    x = 518,170,925.21/20,617.68
  6. Step 6: Final answer
    x = 25,132.36

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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.