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Finding the Fourth Proportional to 18,285.40, 27,384.90 and 12,410.20

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Solution

The fourth proportional to 18,285.40, 27,384.90 and 12,410.20 is: 18,585.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.40 : 27,384.90 = 12,410.20 : x
  2. Step 2: Convert to fraction form
    18,285.40/27,384.90 = 12,410.20/x
  3. Step 3: Cross multiply
    18,285.40x = 27,384.90 × 12,410.20
  4. Step 4: Simplify right side
    18,285.40x = 339,852,085.98
  5. Step 5: Solve for x
    x = 339,852,085.98/18,285.40
  6. Step 6: Final answer
    x = 18,585.98

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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.