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Finding the Fourth Proportional to 15,876.99, 21,910.47 and 8,707.53

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Solution

The fourth proportional to 15,876.99, 21,910.47 and 8,707.53 is: 12,016.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,876.99 : 21,910.47 = 8,707.53 : x
  2. Step 2: Convert to fraction form
    15,876.99/21,910.47 = 8,707.53/x
  3. Step 3: Cross multiply
    15,876.99x = 21,910.47 × 8,707.53
  4. Step 4: Simplify right side
    15,876.99x = 190,786,074.84
  5. Step 5: Solve for x
    x = 190,786,074.84/15,876.99
  6. Step 6: Final answer
    x = 12,016.51

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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.