Home / 21,053.17-31,602.50-18,728.06

Finding the Fourth Proportional to 21,053.17, 31,602.50 and 18,728.06

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Solution

The fourth proportional to 21,053.17, 31,602.50 and 18,728.06 is: 28,112.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.17 : 31,602.50 = 18,728.06 : x
  2. Step 2: Convert to fraction form
    21,053.17/31,602.50 = 18,728.06/x
  3. Step 3: Cross multiply
    21,053.17x = 31,602.50 × 18,728.06
  4. Step 4: Simplify right side
    21,053.17x = 591,853,422.51
  5. Step 5: Solve for x
    x = 591,853,422.51/21,053.17
  6. Step 6: Final answer
    x = 28,112.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.