Home / 20,143.35-30,215.10-6,816.45

Finding the Fourth Proportional to 20,143.35, 30,215.10 and 6,816.45

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Solution

The fourth proportional to 20,143.35, 30,215.10 and 6,816.45 is: 10,224.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.35 : 30,215.10 = 6,816.45 : x
  2. Step 2: Convert to fraction form
    20,143.35/30,215.10 = 6,816.45/x
  3. Step 3: Cross multiply
    20,143.35x = 30,215.10 × 6,816.45
  4. Step 4: Simplify right side
    20,143.35x = 205,959,718.40
  5. Step 5: Solve for x
    x = 205,959,718.40/20,143.35
  6. Step 6: Final answer
    x = 10,224.70

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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.