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Finding the Fourth Proportional to 15,212.14, 20,986.26 and 9,543.04

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Solution

The fourth proportional to 15,212.14, 20,986.26 and 9,543.04 is: 13,165.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.14 : 20,986.26 = 9,543.04 : x
  2. Step 2: Convert to fraction form
    15,212.14/20,986.26 = 9,543.04/x
  3. Step 3: Cross multiply
    15,212.14x = 20,986.26 × 9,543.04
  4. Step 4: Simplify right side
    15,212.14x = 200,272,718.63
  5. Step 5: Solve for x
    x = 200,272,718.63/15,212.14
  6. Step 6: Final answer
    x = 13,165.32

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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.