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Finding the Fourth Proportional to 8,604.90, 12,891.15 and 4,430.70

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Solution

The fourth proportional to 8,604.90, 12,891.15 and 4,430.70 is: 6,637.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,604.90 : 12,891.15 = 4,430.70 : x
  2. Step 2: Convert to fraction form
    8,604.90/12,891.15 = 4,430.70/x
  3. Step 3: Cross multiply
    8,604.90x = 12,891.15 × 4,430.70
  4. Step 4: Simplify right side
    8,604.90x = 57,116,818.31
  5. Step 5: Solve for x
    x = 57,116,818.31/8,604.90
  6. Step 6: Final answer
    x = 6,637.71

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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.