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Finding the Fourth Proportional to 7,312.89, 10,091.61 and 4,168.89

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Solution

The fourth proportional to 7,312.89, 10,091.61 and 4,168.89 is: 5,752.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.89 : 10,091.61 = 4,168.89 : x
  2. Step 2: Convert to fraction form
    7,312.89/10,091.61 = 4,168.89/x
  3. Step 3: Cross multiply
    7,312.89x = 10,091.61 × 4,168.89
  4. Step 4: Simplify right side
    7,312.89x = 42,070,812.01
  5. Step 5: Solve for x
    x = 42,070,812.01/7,312.89
  6. Step 6: Final answer
    x = 5,752.97

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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.