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Finding the Fourth Proportional to 13,720.95, 18,934.88 and 7,433.28

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Solution

The fourth proportional to 13,720.95, 18,934.88 and 7,433.28 is: 10,257.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.95 : 18,934.88 = 7,433.28 : x
  2. Step 2: Convert to fraction form
    13,720.95/18,934.88 = 7,433.28/x
  3. Step 3: Cross multiply
    13,720.95x = 18,934.88 × 7,433.28
  4. Step 4: Simplify right side
    13,720.95x = 140,748,227.64
  5. Step 5: Solve for x
    x = 140,748,227.64/13,720.95
  6. Step 6: Final answer
    x = 10,257.91

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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.