Home / 21,053.42-29,053.47-11,621.78

Finding the Fourth Proportional to 21,053.42, 29,053.47 and 11,621.78

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Solution

The fourth proportional to 21,053.42, 29,053.47 and 11,621.78 is: 16,037.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.42 : 29,053.47 = 11,621.78 : x
  2. Step 2: Convert to fraction form
    21,053.42/29,053.47 = 11,621.78/x
  3. Step 3: Cross multiply
    21,053.42x = 29,053.47 × 11,621.78
  4. Step 4: Simplify right side
    21,053.42x = 337,653,036.58
  5. Step 5: Solve for x
    x = 337,653,036.58/21,053.42
  6. Step 6: Final answer
    x = 16,037.92

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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.