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Finding the Fourth Proportional to 14,572.40, 20,103.72 and 8,603.60

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Solution

The fourth proportional to 14,572.40, 20,103.72 and 8,603.60 is: 11,869.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,572.40 : 20,103.72 = 8,603.60 : x
  2. Step 2: Convert to fraction form
    14,572.40/20,103.72 = 8,603.60/x
  3. Step 3: Cross multiply
    14,572.40x = 20,103.72 × 8,603.60
  4. Step 4: Simplify right side
    14,572.40x = 172,964,365.39
  5. Step 5: Solve for x
    x = 172,964,365.39/14,572.40
  6. Step 6: Final answer
    x = 11,869.31

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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.