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Finding the Fourth Proportional to 15,007.70, 20,707.17 and 8,716.34

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Solution

The fourth proportional to 15,007.70, 20,707.17 and 8,716.34 is: 12,026.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.70 : 20,707.17 = 8,716.34 : x
  2. Step 2: Convert to fraction form
    15,007.70/20,707.17 = 8,716.34/x
  3. Step 3: Cross multiply
    15,007.70x = 20,707.17 × 8,716.34
  4. Step 4: Simplify right side
    15,007.70x = 180,490,734.16
  5. Step 5: Solve for x
    x = 180,490,734.16/15,007.70
  6. Step 6: Final answer
    x = 12,026.54

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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.