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Finding the Fourth Proportional to 8,287.79, 12,372.18 and 7,042.01

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Solution

The fourth proportional to 8,287.79, 12,372.18 and 7,042.01 is: 10,512.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,287.79 : 12,372.18 = 7,042.01 : x
  2. Step 2: Convert to fraction form
    8,287.79/12,372.18 = 7,042.01/x
  3. Step 3: Cross multiply
    8,287.79x = 12,372.18 × 7,042.01
  4. Step 4: Simplify right side
    8,287.79x = 87,124,927.01
  5. Step 5: Solve for x
    x = 87,124,927.01/8,287.79
  6. Step 6: Final answer
    x = 10,512.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.