Home / 21,399.19-29,538.99-19,157.05

Finding the Fourth Proportional to 21,399.19, 29,538.99 and 19,157.05

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Solution

The fourth proportional to 21,399.19, 29,538.99 and 19,157.05 is: 26,443.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.19 : 29,538.99 = 19,157.05 : x
  2. Step 2: Convert to fraction form
    21,399.19/29,538.99 = 19,157.05/x
  3. Step 3: Cross multiply
    21,399.19x = 29,538.99 × 19,157.05
  4. Step 4: Simplify right side
    21,399.19x = 565,879,908.38
  5. Step 5: Solve for x
    x = 565,879,908.38/21,399.19
  6. Step 6: Final answer
    x = 26,443.99

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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.