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Finding the Fourth Proportional to 20,143.70, 30,215.55 and 19,798.10

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Solution

The fourth proportional to 20,143.70, 30,215.55 and 19,798.10 is: 29,697.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.70 : 30,215.55 = 19,798.10 : x
  2. Step 2: Convert to fraction form
    20,143.70/30,215.55 = 19,798.10/x
  3. Step 3: Cross multiply
    20,143.70x = 30,215.55 × 19,798.10
  4. Step 4: Simplify right side
    20,143.70x = 598,210,480.46
  5. Step 5: Solve for x
    x = 598,210,480.46/20,143.70
  6. Step 6: Final answer
    x = 29,697.15

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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.