Home / 15,724.88-21,699.48-8,650.16

Finding the Fourth Proportional to 15,724.88, 21,699.48 and 8,650.16

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Solution

The fourth proportional to 15,724.88, 21,699.48 and 8,650.16 is: 11,936.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.88 : 21,699.48 = 8,650.16 : x
  2. Step 2: Convert to fraction form
    15,724.88/21,699.48 = 8,650.16/x
  3. Step 3: Cross multiply
    15,724.88x = 21,699.48 × 8,650.16
  4. Step 4: Simplify right side
    15,724.88x = 187,703,973.92
  5. Step 5: Solve for x
    x = 187,703,973.92/15,724.88
  6. Step 6: Final answer
    x = 11,936.75

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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.