Home / 21,306.05-29,455.49-15,991.64

Finding the Fourth Proportional to 21,306.05, 29,455.49 and 15,991.64

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Solution

The fourth proportional to 21,306.05, 29,455.49 and 15,991.64 is: 22,108.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,306.05 : 29,455.49 = 15,991.64 : x
  2. Step 2: Convert to fraction form
    21,306.05/29,455.49 = 15,991.64/x
  3. Step 3: Cross multiply
    21,306.05x = 29,455.49 × 15,991.64
  4. Step 4: Simplify right side
    21,306.05x = 471,041,364.87
  5. Step 5: Solve for x
    x = 471,041,364.87/21,306.05
  6. Step 6: Final answer
    x = 22,108.34

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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.