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Finding the Fourth Proportional to 18,383.40, 27,510.30 and 12,810.60

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Solution

The fourth proportional to 18,383.40, 27,510.30 and 12,810.60 is: 19,170.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,383.40 : 27,510.30 = 12,810.60 : x
  2. Step 2: Convert to fraction form
    18,383.40/27,510.30 = 12,810.60/x
  3. Step 3: Cross multiply
    18,383.40x = 27,510.30 × 12,810.60
  4. Step 4: Simplify right side
    18,383.40x = 352,423,449.18
  5. Step 5: Solve for x
    x = 352,423,449.18/18,383.40
  6. Step 6: Final answer
    x = 19,170.74

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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.