Home / 18,428.20-27,646.60-5,280.21

Finding the Fourth Proportional to 18,428.20, 27,646.60 and 5,280.21

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Solution

The fourth proportional to 18,428.20, 27,646.60 and 5,280.21 is: 7,921.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.20 : 27,646.60 = 5,280.21 : x
  2. Step 2: Convert to fraction form
    18,428.20/27,646.60 = 5,280.21/x
  3. Step 3: Cross multiply
    18,428.20x = 27,646.60 × 5,280.21
  4. Step 4: Simplify right side
    18,428.20x = 145,979,853.79
  5. Step 5: Solve for x
    x = 145,979,853.79/18,428.20
  6. Step 6: Final answer
    x = 7,921.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.