Home / 21,107.92-29,128.68-11,547.64

Finding the Fourth Proportional to 21,107.92, 29,128.68 and 11,547.64

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Solution

The fourth proportional to 21,107.92, 29,128.68 and 11,547.64 is: 15,935.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.92 : 29,128.68 = 11,547.64 : x
  2. Step 2: Convert to fraction form
    21,107.92/29,128.68 = 11,547.64/x
  3. Step 3: Cross multiply
    21,107.92x = 29,128.68 × 11,547.64
  4. Step 4: Simplify right side
    21,107.92x = 336,367,510.32
  5. Step 5: Solve for x
    x = 336,367,510.32/21,107.92
  6. Step 6: Final answer
    x = 15,935.61

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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.