Home / 21,803.17-30,079.41-15,821.59

Finding the Fourth Proportional to 21,803.17, 30,079.41 and 15,821.59

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Solution

The fourth proportional to 21,803.17, 30,079.41 and 15,821.59 is: 21,827.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,803.17 : 30,079.41 = 15,821.59 : x
  2. Step 2: Convert to fraction form
    21,803.17/30,079.41 = 15,821.59/x
  3. Step 3: Cross multiply
    21,803.17x = 30,079.41 × 15,821.59
  4. Step 4: Simplify right side
    21,803.17x = 475,904,092.46
  5. Step 5: Solve for x
    x = 475,904,092.46/21,803.17
  6. Step 6: Final answer
    x = 21,827.29

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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.