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Finding the Fourth Proportional to 8,390.38, 12,574.81 and 7,089.46

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Solution

The fourth proportional to 8,390.38, 12,574.81 and 7,089.46 is: 10,625.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.38 : 12,574.81 = 7,089.46 : x
  2. Step 2: Convert to fraction form
    8,390.38/12,574.81 = 7,089.46/x
  3. Step 3: Cross multiply
    8,390.38x = 12,574.81 × 7,089.46
  4. Step 4: Simplify right side
    8,390.38x = 89,148,514.18
  5. Step 5: Solve for x
    x = 89,148,514.18/8,390.38
  6. Step 6: Final answer
    x = 10,625.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.