Home / 11,420.10-17,118.47-6,479.30

Finding the Fourth Proportional to 11,420.10, 17,118.47 and 6,479.30

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Solution

The fourth proportional to 11,420.10, 17,118.47 and 6,479.30 is: 9,712.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,420.10 : 17,118.47 = 6,479.30 : x
  2. Step 2: Convert to fraction form
    11,420.10/17,118.47 = 6,479.30/x
  3. Step 3: Cross multiply
    11,420.10x = 17,118.47 × 6,479.30
  4. Step 4: Simplify right side
    11,420.10x = 110,915,761.67
  5. Step 5: Solve for x
    x = 110,915,761.67/11,420.10
  6. Step 6: Final answer
    x = 9,712.33

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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.