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Finding the Fourth Proportional to 8,802.79, 12,143.78 and 5,074.63

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Solution

The fourth proportional to 8,802.79, 12,143.78 and 5,074.63 is: 7,000.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,802.79 : 12,143.78 = 5,074.63 : x
  2. Step 2: Convert to fraction form
    8,802.79/12,143.78 = 5,074.63/x
  3. Step 3: Cross multiply
    8,802.79x = 12,143.78 × 5,074.63
  4. Step 4: Simplify right side
    8,802.79x = 61,625,190.30
  5. Step 5: Solve for x
    x = 61,625,190.30/8,802.79
  6. Step 6: Final answer
    x = 7,000.64

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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.