Home / 21,396.10-29,529.38-13,224.75

Finding the Fourth Proportional to 21,396.10, 29,529.38 and 13,224.75

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Solution

The fourth proportional to 21,396.10, 29,529.38 and 13,224.75 is: 18,251.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,396.10 : 29,529.38 = 13,224.75 : x
  2. Step 2: Convert to fraction form
    21,396.10/29,529.38 = 13,224.75/x
  3. Step 3: Cross multiply
    21,396.10x = 29,529.38 × 13,224.75
  4. Step 4: Simplify right side
    21,396.10x = 390,518,668.16
  5. Step 5: Solve for x
    x = 390,518,668.16/21,396.10
  6. Step 6: Final answer
    x = 18,251.86

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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.