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Finding the Fourth Proportional to 7,957.85, 10,981.80 and 4,421.39

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Solution

The fourth proportional to 7,957.85, 10,981.80 and 4,421.39 is: 6,101.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,957.85 : 10,981.80 = 4,421.39 : x
  2. Step 2: Convert to fraction form
    7,957.85/10,981.80 = 4,421.39/x
  3. Step 3: Cross multiply
    7,957.85x = 10,981.80 × 4,421.39
  4. Step 4: Simplify right side
    7,957.85x = 48,554,765.79
  5. Step 5: Solve for x
    x = 48,554,765.79/7,957.85
  6. Step 6: Final answer
    x = 6,101.50

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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.