Home / 20,315.78-30,470.58-7,841.72

Finding the Fourth Proportional to 20,315.78, 30,470.58 and 7,841.72

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Solution

The fourth proportional to 20,315.78, 30,470.58 and 7,841.72 is: 11,761.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.78 : 30,470.58 = 7,841.72 : x
  2. Step 2: Convert to fraction form
    20,315.78/30,470.58 = 7,841.72/x
  3. Step 3: Cross multiply
    20,315.78x = 30,470.58 × 7,841.72
  4. Step 4: Simplify right side
    20,315.78x = 238,941,756.60
  5. Step 5: Solve for x
    x = 238,941,756.60/20,315.78
  6. Step 6: Final answer
    x = 11,761.39

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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.