Home / 30,320.80-45,425.78-21,980.13

Finding the Fourth Proportional to 30,320.80, 45,425.78 and 21,980.13

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Solution

The fourth proportional to 30,320.80, 45,425.78 and 21,980.13 is: 32,930.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,320.80 : 45,425.78 = 21,980.13 : x
  2. Step 2: Convert to fraction form
    30,320.80/45,425.78 = 21,980.13/x
  3. Step 3: Cross multiply
    30,320.80x = 45,425.78 × 21,980.13
  4. Step 4: Simplify right side
    30,320.80x = 998,464,549.75
  5. Step 5: Solve for x
    x = 998,464,549.75/30,320.80
  6. Step 6: Final answer
    x = 32,930.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.