Home / 28,557.12-39,407.28-15,979.44

Finding the Fourth Proportional to 28,557.12, 39,407.28 and 15,979.44

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Solution

The fourth proportional to 28,557.12, 39,407.28 and 15,979.44 is: 22,050.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.12 : 39,407.28 = 15,979.44 : x
  2. Step 2: Convert to fraction form
    28,557.12/39,407.28 = 15,979.44/x
  3. Step 3: Cross multiply
    28,557.12x = 39,407.28 × 15,979.44
  4. Step 4: Simplify right side
    28,557.12x = 629,706,266.32
  5. Step 5: Solve for x
    x = 629,706,266.32/28,557.12
  6. Step 6: Final answer
    x = 22,050.76

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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.