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Finding the Fourth Proportional to 12,919.60, 19,374.48 and 5,527.48

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Solution

The fourth proportional to 12,919.60, 19,374.48 and 5,527.48 is: 8,289.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.60 : 19,374.48 = 5,527.48 : x
  2. Step 2: Convert to fraction form
    12,919.60/19,374.48 = 5,527.48/x
  3. Step 3: Cross multiply
    12,919.60x = 19,374.48 × 5,527.48
  4. Step 4: Simplify right side
    12,919.60x = 107,092,050.71
  5. Step 5: Solve for x
    x = 107,092,050.71/12,919.60
  6. Step 6: Final answer
    x = 8,289.12

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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.