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Finding the Fourth Proportional to 12,310.47, 16,988.36 and 6,721.47

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Solution

The fourth proportional to 12,310.47, 16,988.36 and 6,721.47 is: 9,275.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,310.47 : 16,988.36 = 6,721.47 : x
  2. Step 2: Convert to fraction form
    12,310.47/16,988.36 = 6,721.47/x
  3. Step 3: Cross multiply
    12,310.47x = 16,988.36 × 6,721.47
  4. Step 4: Simplify right side
    12,310.47x = 114,186,752.09
  5. Step 5: Solve for x
    x = 114,186,752.09/12,310.47
  6. Step 6: Final answer
    x = 9,275.58

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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.