Home / 19,640.78-29,470.56-9,780.92

Finding the Fourth Proportional to 19,640.78, 29,470.56 and 9,780.92

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Solution

The fourth proportional to 19,640.78, 29,470.56 and 9,780.92 is: 14,676.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.78 : 29,470.56 = 9,780.92 : x
  2. Step 2: Convert to fraction form
    19,640.78/29,470.56 = 9,780.92/x
  3. Step 3: Cross multiply
    19,640.78x = 29,470.56 × 9,780.92
  4. Step 4: Simplify right side
    19,640.78x = 288,249,189.72
  5. Step 5: Solve for x
    x = 288,249,189.72/19,640.78
  6. Step 6: Final answer
    x = 14,676.06

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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.