Home / 21,921.48-30,244.68-12,972.06

Finding the Fourth Proportional to 21,921.48, 30,244.68 and 12,972.06

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Solution

The fourth proportional to 21,921.48, 30,244.68 and 12,972.06 is: 17,897.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,921.48 : 30,244.68 = 12,972.06 : x
  2. Step 2: Convert to fraction form
    21,921.48/30,244.68 = 12,972.06/x
  3. Step 3: Cross multiply
    21,921.48x = 30,244.68 × 12,972.06
  4. Step 4: Simplify right side
    21,921.48x = 392,335,803.64
  5. Step 5: Solve for x
    x = 392,335,803.64/21,921.48
  6. Step 6: Final answer
    x = 17,897.32

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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.