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Finding the Fourth Proportional to 15,207.03, 20,984.27 and 8,918.19

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Solution

The fourth proportional to 15,207.03, 20,984.27 and 8,918.19 is: 12,306.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,207.03 : 20,984.27 = 8,918.19 : x
  2. Step 2: Convert to fraction form
    15,207.03/20,984.27 = 8,918.19/x
  3. Step 3: Cross multiply
    15,207.03x = 20,984.27 × 8,918.19
  4. Step 4: Simplify right side
    15,207.03x = 187,141,662.28
  5. Step 5: Solve for x
    x = 187,141,662.28/15,207.03
  6. Step 6: Final answer
    x = 12,306.26

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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.