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Finding the Fourth Proportional to 18,980.64, 28,270.80 and 18,127.80

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Solution

The fourth proportional to 18,980.64, 28,270.80 and 18,127.80 is: 27,000.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.64 : 28,270.80 = 18,127.80 : x
  2. Step 2: Convert to fraction form
    18,980.64/28,270.80 = 18,127.80/x
  3. Step 3: Cross multiply
    18,980.64x = 28,270.80 × 18,127.80
  4. Step 4: Simplify right side
    18,980.64x = 512,487,408.24
  5. Step 5: Solve for x
    x = 512,487,408.24/18,980.64
  6. Step 6: Final answer
    x = 27,000.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.