Home / 28,218.96-38,943.72-15,643.44

Finding the Fourth Proportional to 28,218.96, 38,943.72 and 15,643.44

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Solution

The fourth proportional to 28,218.96, 38,943.72 and 15,643.44 is: 21,588.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.96 : 38,943.72 = 15,643.44 : x
  2. Step 2: Convert to fraction form
    28,218.96/38,943.72 = 15,643.44/x
  3. Step 3: Cross multiply
    28,218.96x = 38,943.72 × 15,643.44
  4. Step 4: Simplify right side
    28,218.96x = 609,213,747.20
  5. Step 5: Solve for x
    x = 609,213,747.20/28,218.96
  6. Step 6: Final answer
    x = 21,588.81

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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.