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Finding the Fourth Proportional to 5,712.08, 7,880.04 and 3,946.16

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Solution

The fourth proportional to 5,712.08, 7,880.04 and 3,946.16 is: 5,443.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,712.08 : 7,880.04 = 3,946.16 : x
  2. Step 2: Convert to fraction form
    5,712.08/7,880.04 = 3,946.16/x
  3. Step 3: Cross multiply
    5,712.08x = 7,880.04 × 3,946.16
  4. Step 4: Simplify right side
    5,712.08x = 31,095,898.65
  5. Step 5: Solve for x
    x = 31,095,898.65/5,712.08
  6. Step 6: Final answer
    x = 5,443.88

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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.