Home / 21,984.16-30,338.40-12,908.92

Finding the Fourth Proportional to 21,984.16, 30,338.40 and 12,908.92

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Solution

The fourth proportional to 21,984.16, 30,338.40 and 12,908.92 is: 17,814.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.16 : 30,338.40 = 12,908.92 : x
  2. Step 2: Convert to fraction form
    21,984.16/30,338.40 = 12,908.92/x
  3. Step 3: Cross multiply
    21,984.16x = 30,338.40 × 12,908.92
  4. Step 4: Simplify right side
    21,984.16x = 391,635,978.53
  5. Step 5: Solve for x
    x = 391,635,978.53/21,984.16
  6. Step 6: Final answer
    x = 17,814.46

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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.