Home / 21,718.62-29,971.38-12,287.16

Finding the Fourth Proportional to 21,718.62, 29,971.38 and 12,287.16

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Solution

The fourth proportional to 21,718.62, 29,971.38 and 12,287.16 is: 16,956.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,718.62 : 29,971.38 = 12,287.16 : x
  2. Step 2: Convert to fraction form
    21,718.62/29,971.38 = 12,287.16/x
  3. Step 3: Cross multiply
    21,718.62x = 29,971.38 × 12,287.16
  4. Step 4: Simplify right side
    21,718.62x = 368,263,141.48
  5. Step 5: Solve for x
    x = 368,263,141.48/21,718.62
  6. Step 6: Final answer
    x = 16,956.10

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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.