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Finding the Fourth Proportional to 12,901.60, 19,323.60 and 12,613.60

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Solution

The fourth proportional to 12,901.60, 19,323.60 and 12,613.60 is: 18,892.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,901.60 : 19,323.60 = 12,613.60 : x
  2. Step 2: Convert to fraction form
    12,901.60/19,323.60 = 12,613.60/x
  3. Step 3: Cross multiply
    12,901.60x = 19,323.60 × 12,613.60
  4. Step 4: Simplify right side
    12,901.60x = 243,740,160.96
  5. Step 5: Solve for x
    x = 243,740,160.96/12,901.60
  6. Step 6: Final answer
    x = 18,892.24

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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.