Home / 12,429.20-17,152.11-6,840.20

Finding the Fourth Proportional to 12,429.20, 17,152.11 and 6,840.20

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Solution

The fourth proportional to 12,429.20, 17,152.11 and 6,840.20 is: 9,439.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.20 : 17,152.11 = 6,840.20 : x
  2. Step 2: Convert to fraction form
    12,429.20/17,152.11 = 6,840.20/x
  3. Step 3: Cross multiply
    12,429.20x = 17,152.11 × 6,840.20
  4. Step 4: Simplify right side
    12,429.20x = 117,323,798.50
  5. Step 5: Solve for x
    x = 117,323,798.50/12,429.20
  6. Step 6: Final answer
    x = 9,439.37

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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.