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Finding the Fourth Proportional to 8,637.84, 12,939.55 and 6,656.55

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Solution

The fourth proportional to 8,637.84, 12,939.55 and 6,656.55 is: 9,971.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,637.84 : 12,939.55 = 6,656.55 : x
  2. Step 2: Convert to fraction form
    8,637.84/12,939.55 = 6,656.55/x
  3. Step 3: Cross multiply
    8,637.84x = 12,939.55 × 6,656.55
  4. Step 4: Simplify right side
    8,637.84x = 86,132,696.39
  5. Step 5: Solve for x
    x = 86,132,696.39/8,637.84
  6. Step 6: Final answer
    x = 9,971.55

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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.