Home / 21,357.64-29,375.08-18,700.44

Finding the Fourth Proportional to 21,357.64, 29,375.08 and 18,700.44

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Solution

The fourth proportional to 21,357.64, 29,375.08 and 18,700.44 is: 25,720.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,357.64 : 29,375.08 = 18,700.44 : x
  2. Step 2: Convert to fraction form
    21,357.64/29,375.08 = 18,700.44/x
  3. Step 3: Cross multiply
    21,357.64x = 29,375.08 × 18,700.44
  4. Step 4: Simplify right side
    21,357.64x = 549,326,921.04
  5. Step 5: Solve for x
    x = 549,326,921.04/21,357.64
  6. Step 6: Final answer
    x = 25,720.39

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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.