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Finding the Fourth Proportional to 12,943.95, 17,862.48 and 7,279.63

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Solution

The fourth proportional to 12,943.95, 17,862.48 and 7,279.63 is: 10,045.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,943.95 : 17,862.48 = 7,279.63 : x
  2. Step 2: Convert to fraction form
    12,943.95/17,862.48 = 7,279.63/x
  3. Step 3: Cross multiply
    12,943.95x = 17,862.48 × 7,279.63
  4. Step 4: Simplify right side
    12,943.95x = 130,032,245.28
  5. Step 5: Solve for x
    x = 130,032,245.28/12,943.95
  6. Step 6: Final answer
    x = 10,045.79

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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.