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Finding the Fourth Proportional to 18,984.78, 26,174.42 and 13,005.76

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Solution

The fourth proportional to 18,984.78, 26,174.42 and 13,005.76 is: 17,931.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.78 : 26,174.42 = 13,005.76 : x
  2. Step 2: Convert to fraction form
    18,984.78/26,174.42 = 13,005.76/x
  3. Step 3: Cross multiply
    18,984.78x = 26,174.42 × 13,005.76
  4. Step 4: Simplify right side
    18,984.78x = 340,418,224.66
  5. Step 5: Solve for x
    x = 340,418,224.66/18,984.78
  6. Step 6: Final answer
    x = 17,931.11

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1.5x scale

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.