Home / 31,418.04-43,330.80-20,808.60

Finding the Fourth Proportional to 31,418.04, 43,330.80 and 20,808.60

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Solution

The fourth proportional to 31,418.04, 43,330.80 and 20,808.60 is: 28,698.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,418.04 : 43,330.80 = 20,808.60 : x
  2. Step 2: Convert to fraction form
    31,418.04/43,330.80 = 20,808.60/x
  3. Step 3: Cross multiply
    31,418.04x = 43,330.80 × 20,808.60
  4. Step 4: Simplify right side
    31,418.04x = 901,653,284.88
  5. Step 5: Solve for x
    x = 901,653,284.88/31,418.04
  6. Step 6: Final answer
    x = 28,698.58

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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.