Home / 19,356.15-29,034.16-12,780.78

Finding the Fourth Proportional to 19,356.15, 29,034.16 and 12,780.78

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Solution

The fourth proportional to 19,356.15, 29,034.16 and 12,780.78 is: 19,171.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,356.15 : 29,034.16 = 12,780.78 : x
  2. Step 2: Convert to fraction form
    19,356.15/29,034.16 = 12,780.78/x
  3. Step 3: Cross multiply
    19,356.15x = 29,034.16 × 12,780.78
  4. Step 4: Simplify right side
    19,356.15x = 371,079,211.44
  5. Step 5: Solve for x
    x = 371,079,211.44/19,356.15
  6. Step 6: Final answer
    x = 19,171.13

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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.