Home / 30,320.25-45,424.96-21,979.58

Finding the Fourth Proportional to 30,320.25, 45,424.96 and 21,979.58

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Solution

The fourth proportional to 30,320.25, 45,424.96 and 21,979.58 is: 32,929.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,320.25 : 45,424.96 = 21,979.58 : x
  2. Step 2: Convert to fraction form
    30,320.25/45,424.96 = 21,979.58/x
  3. Step 3: Cross multiply
    30,320.25x = 45,424.96 × 21,979.58
  4. Step 4: Simplify right side
    30,320.25x = 998,421,542.32
  5. Step 5: Solve for x
    x = 998,421,542.32/30,320.25
  6. Step 6: Final answer
    x = 32,929.20

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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.