Home / 21,985.56-30,338.46-12,422.46

Finding the Fourth Proportional to 21,985.56, 30,338.46 and 12,422.46

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Solution

The fourth proportional to 21,985.56, 30,338.46 and 12,422.46 is: 17,142.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.56 : 30,338.46 = 12,422.46 : x
  2. Step 2: Convert to fraction form
    21,985.56/30,338.46 = 12,422.46/x
  3. Step 3: Cross multiply
    21,985.56x = 30,338.46 × 12,422.46
  4. Step 4: Simplify right side
    21,985.56x = 376,878,305.81
  5. Step 5: Solve for x
    x = 376,878,305.81/21,985.56
  6. Step 6: Final answer
    x = 17,142.08

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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.