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Finding the Fourth Proportional to 26,655, 36,783.90 and 15,477

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Solution

The fourth proportional to 26,655, 36,783.90 and 15,477 is: 21,358.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,655 : 36,783.90 = 15,477 : x
  2. Step 2: Convert to fraction form
    26,655/36,783.90 = 15,477/x
  3. Step 3: Cross multiply
    26,655x = 36,783.90 × 15,477
  4. Step 4: Simplify right side
    26,655x = 569,304,420.30
  5. Step 5: Solve for x
    x = 569,304,420.30/26,655
  6. Step 6: Final answer
    x = 21,358.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.