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Finding the Fourth Proportional to 7,957.40, 10,980.66 and 4,420.40

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Solution

The fourth proportional to 7,957.40, 10,980.66 and 4,420.40 is: 6,099.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,957.40 : 10,980.66 = 4,420.40 : x
  2. Step 2: Convert to fraction form
    7,957.40/10,980.66 = 4,420.40/x
  3. Step 3: Cross multiply
    7,957.40x = 10,980.66 × 4,420.40
  4. Step 4: Simplify right side
    7,957.40x = 48,538,909.46
  5. Step 5: Solve for x
    x = 48,538,909.46/7,957.40
  6. Step 6: Final answer
    x = 6,099.85

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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.