Home / 21,635.78-29,860.65-15,665.27

Finding the Fourth Proportional to 21,635.78, 29,860.65 and 15,665.27

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Solution

The fourth proportional to 21,635.78, 29,860.65 and 15,665.27 is: 21,620.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,635.78 : 29,860.65 = 15,665.27 : x
  2. Step 2: Convert to fraction form
    21,635.78/29,860.65 = 15,665.27/x
  3. Step 3: Cross multiply
    21,635.78x = 29,860.65 × 15,665.27
  4. Step 4: Simplify right side
    21,635.78x = 467,774,995.32
  5. Step 5: Solve for x
    x = 467,774,995.32/21,635.78
  6. Step 6: Final answer
    x = 21,620.44

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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.