Home / 21,117.88-31,667.46-11,255.32

Finding the Fourth Proportional to 21,117.88, 31,667.46 and 11,255.32

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Solution

The fourth proportional to 21,117.88, 31,667.46 and 11,255.32 is: 16,877.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.88 : 31,667.46 = 11,255.32 : x
  2. Step 2: Convert to fraction form
    21,117.88/31,667.46 = 11,255.32/x
  3. Step 3: Cross multiply
    21,117.88x = 31,667.46 × 11,255.32
  4. Step 4: Simplify right side
    21,117.88x = 356,427,395.89
  5. Step 5: Solve for x
    x = 356,427,395.89/21,117.88
  6. Step 6: Final answer
    x = 16,877.99

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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.