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Finding the Fourth Proportional to 12,310.62, 16,988.66 and 6,721.62

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Solution

The fourth proportional to 12,310.62, 16,988.66 and 6,721.62 is: 9,275.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,310.62 : 16,988.66 = 6,721.62 : x
  2. Step 2: Convert to fraction form
    12,310.62/16,988.66 = 6,721.62/x
  3. Step 3: Cross multiply
    12,310.62x = 16,988.66 × 6,721.62
  4. Step 4: Simplify right side
    12,310.62x = 114,191,316.83
  5. Step 5: Solve for x
    x = 114,191,316.83/12,310.62
  6. Step 6: Final answer
    x = 9,275.84

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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.