Home / 18,428.18-27,642.15-5,280.57

Finding the Fourth Proportional to 18,428.18, 27,642.15 and 5,280.57

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Solution

The fourth proportional to 18,428.18, 27,642.15 and 5,280.57 is: 7,920.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.18 : 27,642.15 = 5,280.57 : x
  2. Step 2: Convert to fraction form
    18,428.18/27,642.15 = 5,280.57/x
  3. Step 3: Cross multiply
    18,428.18x = 27,642.15 × 5,280.57
  4. Step 4: Simplify right side
    18,428.18x = 145,966,308.03
  5. Step 5: Solve for x
    x = 145,966,308.03/18,428.18
  6. Step 6: Final answer
    x = 7,920.82

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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.