Home / 21,117.54-29,122.29-15,751.83

Finding the Fourth Proportional to 21,117.54, 29,122.29 and 15,751.83

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Solution

The fourth proportional to 21,117.54, 29,122.29 and 15,751.83 is: 21,722.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.54 : 29,122.29 = 15,751.83 : x
  2. Step 2: Convert to fraction form
    21,117.54/29,122.29 = 15,751.83/x
  3. Step 3: Cross multiply
    21,117.54x = 29,122.29 × 15,751.83
  4. Step 4: Simplify right side
    21,117.54x = 458,729,361.29
  5. Step 5: Solve for x
    x = 458,729,361.29/21,117.54
  6. Step 6: Final answer
    x = 21,722.67

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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.