Home / 21,221.71-29,287.20-11,790.19

Finding the Fourth Proportional to 21,221.71, 29,287.20 and 11,790.19

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Solution

The fourth proportional to 21,221.71, 29,287.20 and 11,790.19 is: 16,271.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.71 : 29,287.20 = 11,790.19 : x
  2. Step 2: Convert to fraction form
    21,221.71/29,287.20 = 11,790.19/x
  3. Step 3: Cross multiply
    21,221.71x = 29,287.20 × 11,790.19
  4. Step 4: Simplify right side
    21,221.71x = 345,301,652.57
  5. Step 5: Solve for x
    x = 345,301,652.57/21,221.71
  6. Step 6: Final answer
    x = 16,271.15

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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.