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Finding the Fourth Proportional to 8,763.60, 13,145.40 and 7,856.40

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Solution

The fourth proportional to 8,763.60, 13,145.40 and 7,856.40 is: 11,784.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.60 : 13,145.40 = 7,856.40 : x
  2. Step 2: Convert to fraction form
    8,763.60/13,145.40 = 7,856.40/x
  3. Step 3: Cross multiply
    8,763.60x = 13,145.40 × 7,856.40
  4. Step 4: Simplify right side
    8,763.60x = 103,275,520.56
  5. Step 5: Solve for x
    x = 103,275,520.56/8,763.60
  6. Step 6: Final answer
    x = 11,784.60

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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.