Home / 21,621.12-29,837.52-13,123.44

Finding the Fourth Proportional to 21,621.12, 29,837.52 and 13,123.44

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Solution

The fourth proportional to 21,621.12, 29,837.52 and 13,123.44 is: 18,110.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.12 : 29,837.52 = 13,123.44 : x
  2. Step 2: Convert to fraction form
    21,621.12/29,837.52 = 13,123.44/x
  3. Step 3: Cross multiply
    21,621.12x = 29,837.52 × 13,123.44
  4. Step 4: Simplify right side
    21,621.12x = 391,570,903.47
  5. Step 5: Solve for x
    x = 391,570,903.47/21,621.12
  6. Step 6: Final answer
    x = 18,110.57

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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.