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Finding the Fourth Proportional to 15,751.49, 21,737.07 and 8,581.37

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Solution

The fourth proportional to 15,751.49, 21,737.07 and 8,581.37 is: 11,842.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,751.49 : 21,737.07 = 8,581.37 : x
  2. Step 2: Convert to fraction form
    15,751.49/21,737.07 = 8,581.37/x
  3. Step 3: Cross multiply
    15,751.49x = 21,737.07 × 8,581.37
  4. Step 4: Simplify right side
    15,751.49x = 186,533,731.70
  5. Step 5: Solve for x
    x = 186,533,731.70/15,751.49
  6. Step 6: Final answer
    x = 11,842.29

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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.