Home / 25,420.88-35,072.40-15,345.50

Finding the Fourth Proportional to 25,420.88, 35,072.40 and 15,345.50

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Solution

The fourth proportional to 25,420.88, 35,072.40 and 15,345.50 is: 21,171.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,420.88 : 35,072.40 = 15,345.50 : x
  2. Step 2: Convert to fraction form
    25,420.88/35,072.40 = 15,345.50/x
  3. Step 3: Cross multiply
    25,420.88x = 35,072.40 × 15,345.50
  4. Step 4: Simplify right side
    25,420.88x = 538,203,514.20
  5. Step 5: Solve for x
    x = 538,203,514.20/25,420.88
  6. Step 6: Final answer
    x = 21,171.71

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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.