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Finding the Fourth Proportional to 18,278.40, 27,400.80 and 18,267.20

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Solution

The fourth proportional to 18,278.40, 27,400.80 and 18,267.20 is: 27,384.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.40 : 27,400.80 = 18,267.20 : x
  2. Step 2: Convert to fraction form
    18,278.40/27,400.80 = 18,267.20/x
  3. Step 3: Cross multiply
    18,278.40x = 27,400.80 × 18,267.20
  4. Step 4: Simplify right side
    18,278.40x = 500,535,893.76
  5. Step 5: Solve for x
    x = 500,535,893.76/18,278.40
  6. Step 6: Final answer
    x = 27,384.01

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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.