Home / 12,489.70-18,722.28-6,240.34

Finding the Fourth Proportional to 12,489.70, 18,722.28 and 6,240.34

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Solution

The fourth proportional to 12,489.70, 18,722.28 and 6,240.34 is: 9,354.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.70 : 18,722.28 = 6,240.34 : x
  2. Step 2: Convert to fraction form
    12,489.70/18,722.28 = 6,240.34/x
  3. Step 3: Cross multiply
    12,489.70x = 18,722.28 × 6,240.34
  4. Step 4: Simplify right side
    12,489.70x = 116,833,392.78
  5. Step 5: Solve for x
    x = 116,833,392.78/12,489.70
  6. Step 6: Final answer
    x = 9,354.38

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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.