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Finding the Fourth Proportional to 15,020.48, 20,728.32 and 8,396.48

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Solution

The fourth proportional to 15,020.48, 20,728.32 and 8,396.48 is: 11,587.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,020.48 : 20,728.32 = 8,396.48 : x
  2. Step 2: Convert to fraction form
    15,020.48/20,728.32 = 8,396.48/x
  3. Step 3: Cross multiply
    15,020.48x = 20,728.32 × 8,396.48
  4. Step 4: Simplify right side
    15,020.48x = 174,044,924.31
  5. Step 5: Solve for x
    x = 174,044,924.31/15,020.48
  6. Step 6: Final answer
    x = 11,587.17

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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.