Home / 25,455.80-35,127.41-15,378.30

Finding the Fourth Proportional to 25,455.80, 35,127.41 and 15,378.30

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Solution

The fourth proportional to 25,455.80, 35,127.41 and 15,378.30 is: 21,221.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,455.80 : 35,127.41 = 15,378.30 : x
  2. Step 2: Convert to fraction form
    25,455.80/35,127.41 = 15,378.30/x
  3. Step 3: Cross multiply
    25,455.80x = 35,127.41 × 15,378.30
  4. Step 4: Simplify right side
    25,455.80x = 540,199,772.31
  5. Step 5: Solve for x
    x = 540,199,772.31/25,455.80
  6. Step 6: Final answer
    x = 21,221.09

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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.