Home / 25,765.08-38,655-12,621.30

Finding the Fourth Proportional to 25,765.08, 38,655 and 12,621.30

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Solution

The fourth proportional to 25,765.08, 38,655 and 12,621.30 is: 18,935.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,765.08 : 38,655 = 12,621.30 : x
  2. Step 2: Convert to fraction form
    25,765.08/38,655 = 12,621.30/x
  3. Step 3: Cross multiply
    25,765.08x = 38,655 × 12,621.30
  4. Step 4: Simplify right side
    25,765.08x = 487,876,351.50
  5. Step 5: Solve for x
    x = 487,876,351.50/25,765.08
  6. Step 6: Final answer
    x = 18,935.57

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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.