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Finding the Fourth Proportional to 18,602.88, 27,880.58 and 8,720.39

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Solution

The fourth proportional to 18,602.88, 27,880.58 and 8,720.39 is: 13,069.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,602.88 : 27,880.58 = 8,720.39 : x
  2. Step 2: Convert to fraction form
    18,602.88/27,880.58 = 8,720.39/x
  3. Step 3: Cross multiply
    18,602.88x = 27,880.58 × 8,720.39
  4. Step 4: Simplify right side
    18,602.88x = 243,129,348.02
  5. Step 5: Solve for x
    x = 243,129,348.02/18,602.88
  6. Step 6: Final answer
    x = 13,069.45

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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.