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Finding the Fourth Proportional to 21,718.65, 29,985.21 and 16,673.22

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Solution

The fourth proportional to 21,718.65, 29,985.21 and 16,673.22 is: 23,019.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.65 : 29,985.21 = 16,673.22 : x
  2. Step 2: Convert to fraction form
    21,718.65/29,985.21 = 16,673.22/x
  3. Step 3: Cross multiply
    21,718.65x = 29,985.21 × 16,673.22
  4. Step 4: Simplify right side
    21,718.65x = 499,950,003.08
  5. Step 5: Solve for x
    x = 499,950,003.08/21,718.65
  6. Step 6: Final answer
    x = 23,019.39

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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.