Home / 21,276.72-29,335.32-13,710

Finding the Fourth Proportional to 21,276.72, 29,335.32 and 13,710

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Solution

The fourth proportional to 21,276.72, 29,335.32 and 13,710 is: 18,902.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.72 : 29,335.32 = 13,710 : x
  2. Step 2: Convert to fraction form
    21,276.72/29,335.32 = 13,710/x
  3. Step 3: Cross multiply
    21,276.72x = 29,335.32 × 13,710
  4. Step 4: Simplify right side
    21,276.72x = 402,187,237.20
  5. Step 5: Solve for x
    x = 402,187,237.20/21,276.72
  6. Step 6: Final answer
    x = 18,902.69

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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.