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Finding the Fourth Proportional to 18,793.64, 28,203.27 and 12,130.13

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Solution

The fourth proportional to 18,793.64, 28,203.27 and 12,130.13 is: 18,203.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.64 : 28,203.27 = 12,130.13 : x
  2. Step 2: Convert to fraction form
    18,793.64/28,203.27 = 12,130.13/x
  3. Step 3: Cross multiply
    18,793.64x = 28,203.27 × 12,130.13
  4. Step 4: Simplify right side
    18,793.64x = 342,109,190.51
  5. Step 5: Solve for x
    x = 342,109,190.51/18,793.64
  6. Step 6: Final answer
    x = 18,203.46

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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.