Home / 28,488.05-39,280.15-19,418.78

Finding the Fourth Proportional to 28,488.05, 39,280.15 and 19,418.78

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Solution

The fourth proportional to 28,488.05, 39,280.15 and 19,418.78 is: 26,775.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.05 : 39,280.15 = 19,418.78 : x
  2. Step 2: Convert to fraction form
    28,488.05/39,280.15 = 19,418.78/x
  3. Step 3: Cross multiply
    28,488.05x = 39,280.15 × 19,418.78
  4. Step 4: Simplify right side
    28,488.05x = 762,772,394.82
  5. Step 5: Solve for x
    x = 762,772,394.82/28,488.05
  6. Step 6: Final answer
    x = 26,775.18

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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.