Home / 21,531.12-29,700-13,027.20

Finding the Fourth Proportional to 21,531.12, 29,700 and 13,027.20

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Solution

The fourth proportional to 21,531.12, 29,700 and 13,027.20 is: 17,969.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.12 : 29,700 = 13,027.20 : x
  2. Step 2: Convert to fraction form
    21,531.12/29,700 = 13,027.20/x
  3. Step 3: Cross multiply
    21,531.12x = 29,700 × 13,027.20
  4. Step 4: Simplify right side
    21,531.12x = 386,907,840
  5. Step 5: Solve for x
    x = 386,907,840/21,531.12
  6. Step 6: Final answer
    x = 17,969.70

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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.