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Finding the Fourth Proportional to 8,637.84, 12,939.84 and 5,707.44

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Solution

The fourth proportional to 8,637.84, 12,939.84 and 5,707.44 is: 8,549.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637.84 : 12,939.84 = 5,707.44 : x
  2. Step 2: Convert to fraction form
    8,637.84/12,939.84 = 5,707.44/x
  3. Step 3: Cross multiply
    8,637.84x = 12,939.84 × 5,707.44
  4. Step 4: Simplify right side
    8,637.84x = 73,853,360.41
  5. Step 5: Solve for x
    x = 73,853,360.41/8,637.84
  6. Step 6: Final answer
    x = 8,549.98

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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.