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Finding the Fourth Proportional to 18,807.50, 28,231.10 and 18,383.87

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Solution

The fourth proportional to 18,807.50, 28,231.10 and 18,383.87 is: 27,595.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.50 : 28,231.10 = 18,383.87 : x
  2. Step 2: Convert to fraction form
    18,807.50/28,231.10 = 18,383.87/x
  3. Step 3: Cross multiply
    18,807.50x = 28,231.10 × 18,383.87
  4. Step 4: Simplify right side
    18,807.50x = 518,996,639.28
  5. Step 5: Solve for x
    x = 518,996,639.28/18,807.50
  6. Step 6: Final answer
    x = 27,595.20

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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.