Home / 28,357.80-39,134.12-15,612.48

Finding the Fourth Proportional to 28,357.80, 39,134.12 and 15,612.48

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Solution

The fourth proportional to 28,357.80, 39,134.12 and 15,612.48 is: 21,545.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.80 : 39,134.12 = 15,612.48 : x
  2. Step 2: Convert to fraction form
    28,357.80/39,134.12 = 15,612.48/x
  3. Step 3: Cross multiply
    28,357.80x = 39,134.12 × 15,612.48
  4. Step 4: Simplify right side
    28,357.80x = 610,980,665.82
  5. Step 5: Solve for x
    x = 610,980,665.82/28,357.80
  6. Step 6: Final answer
    x = 21,545.42

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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.