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Finding the Fourth Proportional to 13,417.71, 18,515.49 and 7,449.02

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Solution

The fourth proportional to 13,417.71, 18,515.49 and 7,449.02 is: 10,279.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,417.71 : 18,515.49 = 7,449.02 : x
  2. Step 2: Convert to fraction form
    13,417.71/18,515.49 = 7,449.02/x
  3. Step 3: Cross multiply
    13,417.71x = 18,515.49 × 7,449.02
  4. Step 4: Simplify right side
    13,417.71x = 137,922,246.14
  5. Step 5: Solve for x
    x = 137,922,246.14/13,417.71
  6. Step 6: Final answer
    x = 10,279.12

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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.