Home / 21,490.05-29,654.78-11,929.19

Finding the Fourth Proportional to 21,490.05, 29,654.78 and 11,929.19

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Solution

The fourth proportional to 21,490.05, 29,654.78 and 11,929.19 is: 16,461.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.05 : 29,654.78 = 11,929.19 : x
  2. Step 2: Convert to fraction form
    21,490.05/29,654.78 = 11,929.19/x
  3. Step 3: Cross multiply
    21,490.05x = 29,654.78 × 11,929.19
  4. Step 4: Simplify right side
    21,490.05x = 353,757,386.58
  5. Step 5: Solve for x
    x = 353,757,386.58/21,490.05
  6. Step 6: Final answer
    x = 16,461.45

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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.