Home / 28,219.66-38,943.18-15,644.41

Finding the Fourth Proportional to 28,219.66, 38,943.18 and 15,644.41

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Solution

The fourth proportional to 28,219.66, 38,943.18 and 15,644.41 is: 21,589.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,219.66 : 38,943.18 = 15,644.41 : x
  2. Step 2: Convert to fraction form
    28,219.66/38,943.18 = 15,644.41/x
  3. Step 3: Cross multiply
    28,219.66x = 38,943.18 × 15,644.41
  4. Step 4: Simplify right side
    28,219.66x = 609,242,977.27
  5. Step 5: Solve for x
    x = 609,242,977.27/28,219.66
  6. Step 6: Final answer
    x = 21,589.31

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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.