Home / 38,582.88-57,878.56-12,278.40

Finding the Fourth Proportional to 38,582.88, 57,878.56 and 12,278.40

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Solution

The fourth proportional to 38,582.88, 57,878.56 and 12,278.40 is: 18,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,582.88 : 57,878.56 = 12,278.40 : x
  2. Step 2: Convert to fraction form
    38,582.88/57,878.56 = 12,278.40/x
  3. Step 3: Cross multiply
    38,582.88x = 57,878.56 × 12,278.40
  4. Step 4: Simplify right side
    38,582.88x = 710,656,111.10
  5. Step 5: Solve for x
    x = 710,656,111.10/38,582.88
  6. Step 6: Final answer
    x = 18,418.95

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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.