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Finding the Fourth Proportional to 15,172.71, 20,934.81 and 9,203.19

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Solution

The fourth proportional to 15,172.71, 20,934.81 and 9,203.19 is: 12,698.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172.71 : 20,934.81 = 9,203.19 : x
  2. Step 2: Convert to fraction form
    15,172.71/20,934.81 = 9,203.19/x
  3. Step 3: Cross multiply
    15,172.71x = 20,934.81 × 9,203.19
  4. Step 4: Simplify right side
    15,172.71x = 192,667,034.04
  5. Step 5: Solve for x
    x = 192,667,034.04/15,172.71
  6. Step 6: Final answer
    x = 12,698.26

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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.