Home / 21,723.12-29,951.64-18,360

Finding the Fourth Proportional to 21,723.12, 29,951.64 and 18,360

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Solution

The fourth proportional to 21,723.12, 29,951.64 and 18,360 is: 25,314.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,723.12 : 29,951.64 = 18,360 : x
  2. Step 2: Convert to fraction form
    21,723.12/29,951.64 = 18,360/x
  3. Step 3: Cross multiply
    21,723.12x = 29,951.64 × 18,360
  4. Step 4: Simplify right side
    21,723.12x = 549,912,110.40
  5. Step 5: Solve for x
    x = 549,912,110.40/21,723.12
  6. Step 6: Final answer
    x = 25,314.60

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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.