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Finding the Fourth Proportional to 15,608.90, 21,538.90 and 8,894.28

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Solution

The fourth proportional to 15,608.90, 21,538.90 and 8,894.28 is: 12,273.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,608.90 : 21,538.90 = 8,894.28 : x
  2. Step 2: Convert to fraction form
    15,608.90/21,538.90 = 8,894.28/x
  3. Step 3: Cross multiply
    15,608.90x = 21,538.90 × 8,894.28
  4. Step 4: Simplify right side
    15,608.90x = 191,573,007.49
  5. Step 5: Solve for x
    x = 191,573,007.49/15,608.90
  6. Step 6: Final answer
    x = 12,273.32

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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.