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Finding the Fourth Proportional to 21,616.33, 29,811.13 and 18,441.08

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Solution

The fourth proportional to 21,616.33, 29,811.13 and 18,441.08 is: 25,432.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,616.33 : 29,811.13 = 18,441.08 : x
  2. Step 2: Convert to fraction form
    21,616.33/29,811.13 = 18,441.08/x
  3. Step 3: Cross multiply
    21,616.33x = 29,811.13 × 18,441.08
  4. Step 4: Simplify right side
    21,616.33x = 549,749,433.22
  5. Step 5: Solve for x
    x = 549,749,433.22/21,616.33
  6. Step 6: Final answer
    x = 25,432.14

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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.