Home / 8,939.25-12,339-6,294.40

Finding the Fourth Proportional to 8,939.25, 12,339 and 6,294.40

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Solution

The fourth proportional to 8,939.25, 12,339 and 6,294.40 is: 8,688.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.25 : 12,339 = 6,294.40 : x
  2. Step 2: Convert to fraction form
    8,939.25/12,339 = 6,294.40/x
  3. Step 3: Cross multiply
    8,939.25x = 12,339 × 6,294.40
  4. Step 4: Simplify right side
    8,939.25x = 77,666,601.60
  5. Step 5: Solve for x
    x = 77,666,601.60/8,939.25
  6. Step 6: Final answer
    x = 8,688.27

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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.