Home / 25,420.80-38,131.20-7,892.40

Finding the Fourth Proportional to 25,420.80, 38,131.20 and 7,892.40

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Solution

The fourth proportional to 25,420.80, 38,131.20 and 7,892.40 is: 11,838.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,420.80 : 38,131.20 = 7,892.40 : x
  2. Step 2: Convert to fraction form
    25,420.80/38,131.20 = 7,892.40/x
  3. Step 3: Cross multiply
    25,420.80x = 38,131.20 × 7,892.40
  4. Step 4: Simplify right side
    25,420.80x = 300,946,682.88
  5. Step 5: Solve for x
    x = 300,946,682.88/25,420.80
  6. Step 6: Final answer
    x = 11,838.60

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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.