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Finding the Fourth Proportional to 13,141.60, 19,712.40 and 5,346.40

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Solution

The fourth proportional to 13,141.60, 19,712.40 and 5,346.40 is: 8,019.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.60 : 19,712.40 = 5,346.40 : x
  2. Step 2: Convert to fraction form
    13,141.60/19,712.40 = 5,346.40/x
  3. Step 3: Cross multiply
    13,141.60x = 19,712.40 × 5,346.40
  4. Step 4: Simplify right side
    13,141.60x = 105,390,375.36
  5. Step 5: Solve for x
    x = 105,390,375.36/13,141.60
  6. Step 6: Final answer
    x = 8,019.60

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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.