Home / 15,724.09-21,699.20-8,650.49

Finding the Fourth Proportional to 15,724.09, 21,699.20 and 8,650.49

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Solution

The fourth proportional to 15,724.09, 21,699.20 and 8,650.49 is: 11,937.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.09 : 21,699.20 = 8,650.49 : x
  2. Step 2: Convert to fraction form
    15,724.09/21,699.20 = 8,650.49/x
  3. Step 3: Cross multiply
    15,724.09x = 21,699.20 × 8,650.49
  4. Step 4: Simplify right side
    15,724.09x = 187,708,669.36
  5. Step 5: Solve for x
    x = 187,708,669.36/15,724.09
  6. Step 6: Final answer
    x = 11,937.65

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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.