Home / 21,705.09-29,922.18-15,311.76

Finding the Fourth Proportional to 21,705.09, 29,922.18 and 15,311.76

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Solution

The fourth proportional to 21,705.09, 29,922.18 and 15,311.76 is: 21,108.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.09 : 29,922.18 = 15,311.76 : x
  2. Step 2: Convert to fraction form
    21,705.09/29,922.18 = 15,311.76/x
  3. Step 3: Cross multiply
    21,705.09x = 29,922.18 × 15,311.76
  4. Step 4: Simplify right side
    21,705.09x = 458,161,238.84
  5. Step 5: Solve for x
    x = 458,161,238.84/21,705.09
  6. Step 6: Final answer
    x = 21,108.47

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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.