Home / 28,621.65-39,500.25-15,878.95

Finding the Fourth Proportional to 28,621.65, 39,500.25 and 15,878.95

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Solution

The fourth proportional to 28,621.65, 39,500.25 and 15,878.95 is: 21,914.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,621.65 : 39,500.25 = 15,878.95 : x
  2. Step 2: Convert to fraction form
    28,621.65/39,500.25 = 15,878.95/x
  3. Step 3: Cross multiply
    28,621.65x = 39,500.25 × 15,878.95
  4. Step 4: Simplify right side
    28,621.65x = 627,222,494.74
  5. Step 5: Solve for x
    x = 627,222,494.74/28,621.65
  6. Step 6: Final answer
    x = 21,914.27

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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.