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Finding the Fourth Proportional to 18,266.80, 27,416.40 and 15,642.40

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Solution

The fourth proportional to 18,266.80, 27,416.40 and 15,642.40 is: 23,477.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,266.80 : 27,416.40 = 15,642.40 : x
  2. Step 2: Convert to fraction form
    18,266.80/27,416.40 = 15,642.40/x
  3. Step 3: Cross multiply
    18,266.80x = 27,416.40 × 15,642.40
  4. Step 4: Simplify right side
    18,266.80x = 428,858,295.36
  5. Step 5: Solve for x
    x = 428,858,295.36/18,266.80
  6. Step 6: Final answer
    x = 23,477.47

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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.