Home / 30,284.20-41,775.78-21,903.40

Finding the Fourth Proportional to 30,284.20, 41,775.78 and 21,903.40

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Solution

The fourth proportional to 30,284.20, 41,775.78 and 21,903.40 is: 30,214.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,284.20 : 41,775.78 = 21,903.40 : x
  2. Step 2: Convert to fraction form
    30,284.20/41,775.78 = 21,903.40/x
  3. Step 3: Cross multiply
    30,284.20x = 41,775.78 × 21,903.40
  4. Step 4: Simplify right side
    30,284.20x = 915,031,619.65
  5. Step 5: Solve for x
    x = 915,031,619.65/30,284.20
  6. Step 6: Final answer
    x = 30,214.82

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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.