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Finding the Fourth Proportional to 19,287.44, 28,931.16 and 18,302.48

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Solution

The fourth proportional to 19,287.44, 28,931.16 and 18,302.48 is: 27,453.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,287.44 : 28,931.16 = 18,302.48 : x
  2. Step 2: Convert to fraction form
    19,287.44/28,931.16 = 18,302.48/x
  3. Step 3: Cross multiply
    19,287.44x = 28,931.16 × 18,302.48
  4. Step 4: Simplify right side
    19,287.44x = 529,511,977.28
  5. Step 5: Solve for x
    x = 529,511,977.28/19,287.44
  6. Step 6: Final answer
    x = 27,453.72

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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.