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Finding the Fourth Proportional to 13,734.88, 18,953.92 and 7,447.20

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Solution

The fourth proportional to 13,734.88, 18,953.92 and 7,447.20 is: 10,277.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,734.88 : 18,953.92 = 7,447.20 : x
  2. Step 2: Convert to fraction form
    13,734.88/18,953.92 = 7,447.20/x
  3. Step 3: Cross multiply
    13,734.88x = 18,953.92 × 7,447.20
  4. Step 4: Simplify right side
    13,734.88x = 141,153,633.02
  5. Step 5: Solve for x
    x = 141,153,633.02/13,734.88
  6. Step 6: Final answer
    x = 10,277.02

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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.