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Finding the Fourth Proportional to 21,641.66, 29,798.87 and 18,447.79

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Solution

The fourth proportional to 21,641.66, 29,798.87 and 18,447.79 is: 25,401.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.66 : 29,798.87 = 18,447.79 : x
  2. Step 2: Convert to fraction form
    21,641.66/29,798.87 = 18,447.79/x
  3. Step 3: Cross multiply
    21,641.66x = 29,798.87 × 18,447.79
  4. Step 4: Simplify right side
    21,641.66x = 549,723,241.01
  5. Step 5: Solve for x
    x = 549,723,241.01/21,641.66
  6. Step 6: Final answer
    x = 25,401.16

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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.