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Finding the Fourth Proportional to 12,762.81, 17,612.78 and 7,173.81

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Solution

The fourth proportional to 12,762.81, 17,612.78 and 7,173.81 is: 9,899.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762.81 : 17,612.78 = 7,173.81 : x
  2. Step 2: Convert to fraction form
    12,762.81/17,612.78 = 7,173.81/x
  3. Step 3: Cross multiply
    12,762.81x = 17,612.78 × 7,173.81
  4. Step 4: Simplify right side
    12,762.81x = 126,350,701.42
  5. Step 5: Solve for x
    x = 126,350,701.42/12,762.81
  6. Step 6: Final answer
    x = 9,899.91

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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.