Home / 28,621.08-39,499.11-15,878.34

Finding the Fourth Proportional to 28,621.08, 39,499.11 and 15,878.34

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Solution

The fourth proportional to 28,621.08, 39,499.11 and 15,878.34 is: 21,913.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,621.08 : 39,499.11 = 15,878.34 : x
  2. Step 2: Convert to fraction form
    28,621.08/39,499.11 = 15,878.34/x
  3. Step 3: Cross multiply
    28,621.08x = 39,499.11 × 15,878.34
  4. Step 4: Simplify right side
    28,621.08x = 627,180,298.28
  5. Step 5: Solve for x
    x = 627,180,298.28/28,621.08
  6. Step 6: Final answer
    x = 21,913.23

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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.