Home / 30,481.56-42,041.94-21,519.72

Finding the Fourth Proportional to 30,481.56, 42,041.94 and 21,519.72

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Solution

The fourth proportional to 30,481.56, 42,041.94 and 21,519.72 is: 29,681.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,481.56 : 42,041.94 = 21,519.72 : x
  2. Step 2: Convert to fraction form
    30,481.56/42,041.94 = 21,519.72/x
  3. Step 3: Cross multiply
    30,481.56x = 42,041.94 × 21,519.72
  4. Step 4: Simplify right side
    30,481.56x = 904,730,777.06
  5. Step 5: Solve for x
    x = 904,730,777.06/30,481.56
  6. Step 6: Final answer
    x = 29,681.25

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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.