Home / 21,231.08-31,859.42-7,389.80

Finding the Fourth Proportional to 21,231.08, 31,859.42 and 7,389.80

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Solution

The fourth proportional to 21,231.08, 31,859.42 and 7,389.80 is: 11,089.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.08 : 31,859.42 = 7,389.80 : x
  2. Step 2: Convert to fraction form
    21,231.08/31,859.42 = 7,389.80/x
  3. Step 3: Cross multiply
    21,231.08x = 31,859.42 × 7,389.80
  4. Step 4: Simplify right side
    21,231.08x = 235,434,741.92
  5. Step 5: Solve for x
    x = 235,434,741.92/21,231.08
  6. Step 6: Final answer
    x = 11,089.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.