Home / 21,246.72-29,320.16-11,815.12

Finding the Fourth Proportional to 21,246.72, 29,320.16 and 11,815.12

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Solution

The fourth proportional to 21,246.72, 29,320.16 and 11,815.12 is: 16,304.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246.72 : 29,320.16 = 11,815.12 : x
  2. Step 2: Convert to fraction form
    21,246.72/29,320.16 = 11,815.12/x
  3. Step 3: Cross multiply
    21,246.72x = 29,320.16 × 11,815.12
  4. Step 4: Simplify right side
    21,246.72x = 346,421,208.82
  5. Step 5: Solve for x
    x = 346,421,208.82/21,246.72
  6. Step 6: Final answer
    x = 16,304.69

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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.