Home / 21,280.60-29,366.96-11,720.31

Finding the Fourth Proportional to 21,280.60, 29,366.96 and 11,720.31

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Solution

The fourth proportional to 21,280.60, 29,366.96 and 11,720.31 is: 16,173.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.60 : 29,366.96 = 11,720.31 : x
  2. Step 2: Convert to fraction form
    21,280.60/29,366.96 = 11,720.31/x
  3. Step 3: Cross multiply
    21,280.60x = 29,366.96 × 11,720.31
  4. Step 4: Simplify right side
    21,280.60x = 344,189,669.52
  5. Step 5: Solve for x
    x = 344,189,669.52/21,280.60
  6. Step 6: Final answer
    x = 16,173.87

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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.