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Finding the Fourth Proportional to 12,930.39, 17,840.93 and 9,387.45

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Solution

The fourth proportional to 12,930.39, 17,840.93 and 9,387.45 is: 12,952.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.39 : 17,840.93 = 9,387.45 : x
  2. Step 2: Convert to fraction form
    12,930.39/17,840.93 = 9,387.45/x
  3. Step 3: Cross multiply
    12,930.39x = 17,840.93 × 9,387.45
  4. Step 4: Simplify right side
    12,930.39x = 167,480,791.39
  5. Step 5: Solve for x
    x = 167,480,791.39/12,930.39
  6. Step 6: Final answer
    x = 12,952.49

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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.