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Finding the Fourth Proportional to 6,358.90, 8,772.30 and 4,121.50

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Solution

The fourth proportional to 6,358.90, 8,772.30 and 4,121.50 is: 5,685.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,358.90 : 8,772.30 = 4,121.50 : x
  2. Step 2: Convert to fraction form
    6,358.90/8,772.30 = 4,121.50/x
  3. Step 3: Cross multiply
    6,358.90x = 8,772.30 × 4,121.50
  4. Step 4: Simplify right side
    6,358.90x = 36,155,034.45
  5. Step 5: Solve for x
    x = 36,155,034.45/6,358.90
  6. Step 6: Final answer
    x = 5,685.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.