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Finding the Fourth Proportional to 14,291.78, 19,722.66 and 8,004.20

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Solution

The fourth proportional to 14,291.78, 19,722.66 and 8,004.20 is: 11,045.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,291.78 : 19,722.66 = 8,004.20 : x
  2. Step 2: Convert to fraction form
    14,291.78/19,722.66 = 8,004.20/x
  3. Step 3: Cross multiply
    14,291.78x = 19,722.66 × 8,004.20
  4. Step 4: Simplify right side
    14,291.78x = 157,864,115.17
  5. Step 5: Solve for x
    x = 157,864,115.17/14,291.78
  6. Step 6: Final answer
    x = 11,045.80

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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.