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Finding the Fourth Proportional to 18,570.80, 27,818.40 and 11,529.20

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Solution

The fourth proportional to 18,570.80, 27,818.40 and 11,529.20 is: 17,270.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,570.80 : 27,818.40 = 11,529.20 : x
  2. Step 2: Convert to fraction form
    18,570.80/27,818.40 = 11,529.20/x
  3. Step 3: Cross multiply
    18,570.80x = 27,818.40 × 11,529.20
  4. Step 4: Simplify right side
    18,570.80x = 320,723,897.28
  5. Step 5: Solve for x
    x = 320,723,897.28/18,570.80
  6. Step 6: Final answer
    x = 17,270.33

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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.