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Finding the Fourth Proportional to 13,897.48, 20,856.30 and 8,048.20

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Solution

The fourth proportional to 13,897.48, 20,856.30 and 8,048.20 is: 12,078.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,897.48 : 20,856.30 = 8,048.20 : x
  2. Step 2: Convert to fraction form
    13,897.48/20,856.30 = 8,048.20/x
  3. Step 3: Cross multiply
    13,897.48x = 20,856.30 × 8,048.20
  4. Step 4: Simplify right side
    13,897.48x = 167,855,673.66
  5. Step 5: Solve for x
    x = 167,855,673.66/13,897.48
  6. Step 6: Final answer
    x = 12,078.14

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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.