Home / 18,289.90-25,240.04-9,906.40

Finding the Fourth Proportional to 18,289.90, 25,240.04 and 9,906.40

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Solution

The fourth proportional to 18,289.90, 25,240.04 and 9,906.40 is: 13,670.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,289.90 : 25,240.04 = 9,906.40 : x
  2. Step 2: Convert to fraction form
    18,289.90/25,240.04 = 9,906.40/x
  3. Step 3: Cross multiply
    18,289.90x = 25,240.04 × 9,906.40
  4. Step 4: Simplify right side
    18,289.90x = 250,037,932.26
  5. Step 5: Solve for x
    x = 250,037,932.26/18,289.90
  6. Step 6: Final answer
    x = 13,670.82

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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.