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Finding the Fourth Proportional to 18,952.18, 28,443.76 and 13,410.87

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Solution

The fourth proportional to 18,952.18, 28,443.76 and 13,410.87 is: 20,127.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,952.18 : 28,443.76 = 13,410.87 : x
  2. Step 2: Convert to fraction form
    18,952.18/28,443.76 = 13,410.87/x
  3. Step 3: Cross multiply
    18,952.18x = 28,443.76 × 13,410.87
  4. Step 4: Simplify right side
    18,952.18x = 381,455,427.48
  5. Step 5: Solve for x
    x = 381,455,427.48/18,952.18
  6. Step 6: Final answer
    x = 20,127.26

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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.