Home / 39,970.11-55,158.84-21,820.83

Finding the Fourth Proportional to 39,970.11, 55,158.84 and 21,820.83

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Solution

The fourth proportional to 39,970.11, 55,158.84 and 21,820.83 is: 30,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,970.11 : 55,158.84 = 21,820.83 : x
  2. Step 2: Convert to fraction form
    39,970.11/55,158.84 = 21,820.83/x
  3. Step 3: Cross multiply
    39,970.11x = 55,158.84 × 21,820.83
  4. Step 4: Simplify right side
    39,970.11x = 1,203,611,670.64
  5. Step 5: Solve for x
    x = 1,203,611,670.64/39,970.11
  6. Step 6: Final answer
    x = 30,112.79

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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.