Home / 21,255.93-31,869.47-11,902.38

Finding the Fourth Proportional to 21,255.93, 31,869.47 and 11,902.38

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Solution

The fourth proportional to 21,255.93, 31,869.47 and 11,902.38 is: 17,845.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.93 : 31,869.47 = 11,902.38 : x
  2. Step 2: Convert to fraction form
    21,255.93/31,869.47 = 11,902.38/x
  3. Step 3: Cross multiply
    21,255.93x = 31,869.47 × 11,902.38
  4. Step 4: Simplify right side
    21,255.93x = 379,322,482.83
  5. Step 5: Solve for x
    x = 379,322,482.83/21,255.93
  6. Step 6: Final answer
    x = 17,845.49

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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.