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Finding the Fourth Proportional to 20,273.80, 30,410.70 and 13,275.40

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Solution

The fourth proportional to 20,273.80, 30,410.70 and 13,275.40 is: 19,913.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,273.80 : 30,410.70 = 13,275.40 : x
  2. Step 2: Convert to fraction form
    20,273.80/30,410.70 = 13,275.40/x
  3. Step 3: Cross multiply
    20,273.80x = 30,410.70 × 13,275.40
  4. Step 4: Simplify right side
    20,273.80x = 403,714,206.78
  5. Step 5: Solve for x
    x = 403,714,206.78/20,273.80
  6. Step 6: Final answer
    x = 19,913.10

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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.