Home / 21,956.78-30,300.45-12,397.08

Finding the Fourth Proportional to 21,956.78, 30,300.45 and 12,397.08

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Solution

The fourth proportional to 21,956.78, 30,300.45 and 12,397.08 is: 17,108.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.78 : 30,300.45 = 12,397.08 : x
  2. Step 2: Convert to fraction form
    21,956.78/30,300.45 = 12,397.08/x
  3. Step 3: Cross multiply
    21,956.78x = 30,300.45 × 12,397.08
  4. Step 4: Simplify right side
    21,956.78x = 375,637,169.82
  5. Step 5: Solve for x
    x = 375,637,169.82/21,956.78
  6. Step 6: Final answer
    x = 17,108.03

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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.