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Finding the Fourth Proportional to 18,510.64, 27,775.08 and 8,650.60

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Solution

The fourth proportional to 18,510.64, 27,775.08 and 8,650.60 is: 12,980.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,510.64 : 27,775.08 = 8,650.60 : x
  2. Step 2: Convert to fraction form
    18,510.64/27,775.08 = 8,650.60/x
  3. Step 3: Cross multiply
    18,510.64x = 27,775.08 × 8,650.60
  4. Step 4: Simplify right side
    18,510.64x = 240,271,107.05
  5. Step 5: Solve for x
    x = 240,271,107.05/18,510.64
  6. Step 6: Final answer
    x = 12,980.16

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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.