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Finding the Fourth Proportional to 7,880.40, 10,874.92 and 4,343.61

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Solution

The fourth proportional to 7,880.40, 10,874.92 and 4,343.61 is: 5,994.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.40 : 10,874.92 = 4,343.61 : x
  2. Step 2: Convert to fraction form
    7,880.40/10,874.92 = 4,343.61/x
  3. Step 3: Cross multiply
    7,880.40x = 10,874.92 × 4,343.61
  4. Step 4: Simplify right side
    7,880.40x = 47,236,411.26
  5. Step 5: Solve for x
    x = 47,236,411.26/7,880.40
  6. Step 6: Final answer
    x = 5,994.16

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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.