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Finding the Fourth Proportional to 12,944.21, 17,862.88 and 7,278.99

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Solution

The fourth proportional to 12,944.21, 17,862.88 and 7,278.99 is: 10,044.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,944.21 : 17,862.88 = 7,278.99 : x
  2. Step 2: Convert to fraction form
    12,944.21/17,862.88 = 7,278.99/x
  3. Step 3: Cross multiply
    12,944.21x = 17,862.88 × 7,278.99
  4. Step 4: Simplify right side
    12,944.21x = 130,023,701.51
  5. Step 5: Solve for x
    x = 130,023,701.51/12,944.21
  6. Step 6: Final answer
    x = 10,044.93

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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.