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Finding the Fourth Proportional to 12,646.76, 18,970.88 and 3,881.76

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Solution

The fourth proportional to 12,646.76, 18,970.88 and 3,881.76 is: 5,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,646.76 : 18,970.88 = 3,881.76 : x
  2. Step 2: Convert to fraction form
    12,646.76/18,970.88 = 3,881.76/x
  3. Step 3: Cross multiply
    12,646.76x = 18,970.88 × 3,881.76
  4. Step 4: Simplify right side
    12,646.76x = 73,640,403.15
  5. Step 5: Solve for x
    x = 73,640,403.15/12,646.76
  6. Step 6: Final answer
    x = 5,822.87

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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.