Home / 21,669.80-29,883-13,173.08

Finding the Fourth Proportional to 21,669.80, 29,883 and 13,173.08

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Solution

The fourth proportional to 21,669.80, 29,883 and 13,173.08 is: 18,165.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,669.80 : 29,883 = 13,173.08 : x
  2. Step 2: Convert to fraction form
    21,669.80/29,883 = 13,173.08/x
  3. Step 3: Cross multiply
    21,669.80x = 29,883 × 13,173.08
  4. Step 4: Simplify right side
    21,669.80x = 393,651,149.64
  5. Step 5: Solve for x
    x = 393,651,149.64/21,669.80
  6. Step 6: Final answer
    x = 18,165.89

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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.