Home / 21,943.64-30,282.45-12,512.81

Finding the Fourth Proportional to 21,943.64, 30,282.45 and 12,512.81

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Solution

The fourth proportional to 21,943.64, 30,282.45 and 12,512.81 is: 17,267.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,943.64 : 30,282.45 = 12,512.81 : x
  2. Step 2: Convert to fraction form
    21,943.64/30,282.45 = 12,512.81/x
  3. Step 3: Cross multiply
    21,943.64x = 30,282.45 × 12,512.81
  4. Step 4: Simplify right side
    21,943.64x = 378,918,543.18
  5. Step 5: Solve for x
    x = 378,918,543.18/21,943.64
  6. Step 6: Final answer
    x = 17,267.81

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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.