Home / 19,356.28-29,034.35-12,780.90

Finding the Fourth Proportional to 19,356.28, 29,034.35 and 12,780.90

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Solution

The fourth proportional to 19,356.28, 29,034.35 and 12,780.90 is: 19,171.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,356.28 : 29,034.35 = 12,780.90 : x
  2. Step 2: Convert to fraction form
    19,356.28/29,034.35 = 12,780.90/x
  3. Step 3: Cross multiply
    19,356.28x = 29,034.35 × 12,780.90
  4. Step 4: Simplify right side
    19,356.28x = 371,085,107.94
  5. Step 5: Solve for x
    x = 371,085,107.94/19,356.28
  6. Step 6: Final answer
    x = 19,171.31

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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.