Home / 20,074.68-30,130.50-10,221

Finding the Fourth Proportional to 20,074.68, 30,130.50 and 10,221

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Solution

The fourth proportional to 20,074.68, 30,130.50 and 10,221 is: 15,340.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,074.68 : 30,130.50 = 10,221 : x
  2. Step 2: Convert to fraction form
    20,074.68/30,130.50 = 10,221/x
  3. Step 3: Cross multiply
    20,074.68x = 30,130.50 × 10,221
  4. Step 4: Simplify right side
    20,074.68x = 307,963,840.50
  5. Step 5: Solve for x
    x = 307,963,840.50/20,074.68
  6. Step 6: Final answer
    x = 15,340.91

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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.