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Finding the Fourth Proportional to 18,603.63, 27,881.70 and 8,721.15

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Solution

The fourth proportional to 18,603.63, 27,881.70 and 8,721.15 is: 13,070.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,603.63 : 27,881.70 = 8,721.15 : x
  2. Step 2: Convert to fraction form
    18,603.63/27,881.70 = 8,721.15/x
  3. Step 3: Cross multiply
    18,603.63x = 27,881.70 × 8,721.15
  4. Step 4: Simplify right side
    18,603.63x = 243,160,487.96
  5. Step 5: Solve for x
    x = 243,160,487.96/18,603.63
  6. Step 6: Final answer
    x = 13,070.59

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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.