Home / 11,388.93-17,047.85-8,390.36

Finding the Fourth Proportional to 11,388.93, 17,047.85 and 8,390.36

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Solution

The fourth proportional to 11,388.93, 17,047.85 and 8,390.36 is: 12,559.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,388.93 : 17,047.85 = 8,390.36 : x
  2. Step 2: Convert to fraction form
    11,388.93/17,047.85 = 8,390.36/x
  3. Step 3: Cross multiply
    11,388.93x = 17,047.85 × 8,390.36
  4. Step 4: Simplify right side
    11,388.93x = 143,037,471.53
  5. Step 5: Solve for x
    x = 143,037,471.53/11,388.93
  6. Step 6: Final answer
    x = 12,559.34

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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.