Home / 25,621.20-38,431.80-16,808.40

Finding the Fourth Proportional to 25,621.20, 38,431.80 and 16,808.40

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Solution

The fourth proportional to 25,621.20, 38,431.80 and 16,808.40 is: 25,212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,621.20 : 38,431.80 = 16,808.40 : x
  2. Step 2: Convert to fraction form
    25,621.20/38,431.80 = 16,808.40/x
  3. Step 3: Cross multiply
    25,621.20x = 38,431.80 × 16,808.40
  4. Step 4: Simplify right side
    25,621.20x = 645,977,067.12
  5. Step 5: Solve for x
    x = 645,977,067.12/25,621.20
  6. Step 6: Final answer
    x = 25,212.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.