Home / 21,438.10-29,570.35-16,954.75

Finding the Fourth Proportional to 21,438.10, 29,570.35 and 16,954.75

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Solution

The fourth proportional to 21,438.10, 29,570.35 and 16,954.75 is: 23,386.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.10 : 29,570.35 = 16,954.75 : x
  2. Step 2: Convert to fraction form
    21,438.10/29,570.35 = 16,954.75/x
  3. Step 3: Cross multiply
    21,438.10x = 29,570.35 × 16,954.75
  4. Step 4: Simplify right side
    21,438.10x = 501,357,891.66
  5. Step 5: Solve for x
    x = 501,357,891.66/21,438.10
  6. Step 6: Final answer
    x = 23,386.30

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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.