Home / 21,655.80-29,887.11-13,156.07

Finding the Fourth Proportional to 21,655.80, 29,887.11 and 13,156.07

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Solution

The fourth proportional to 21,655.80, 29,887.11 and 13,156.07 is: 18,156.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.80 : 29,887.11 = 13,156.07 : x
  2. Step 2: Convert to fraction form
    21,655.80/29,887.11 = 13,156.07/x
  3. Step 3: Cross multiply
    21,655.80x = 29,887.11 × 13,156.07
  4. Step 4: Simplify right side
    21,655.80x = 393,196,761.82
  5. Step 5: Solve for x
    x = 393,196,761.82/21,655.80
  6. Step 6: Final answer
    x = 18,156.65

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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.