Home / 15,724.21-21,699.41-8,650.59

Finding the Fourth Proportional to 15,724.21, 21,699.41 and 8,650.59

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Solution

The fourth proportional to 15,724.21, 21,699.41 and 8,650.59 is: 11,937.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,724.21 : 21,699.41 = 8,650.59 : x
  2. Step 2: Convert to fraction form
    15,724.21/21,699.41 = 8,650.59/x
  3. Step 3: Cross multiply
    15,724.21x = 21,699.41 × 8,650.59
  4. Step 4: Simplify right side
    15,724.21x = 187,712,699.15
  5. Step 5: Solve for x
    x = 187,712,699.15/15,724.21
  6. Step 6: Final answer
    x = 11,937.81

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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.