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Finding the Fourth Proportional to 8,405.04, 12,608.24 and 2,856.16

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Solution

The fourth proportional to 8,405.04, 12,608.24 and 2,856.16 is: 4,284.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.04 : 12,608.24 = 2,856.16 : x
  2. Step 2: Convert to fraction form
    8,405.04/12,608.24 = 2,856.16/x
  3. Step 3: Cross multiply
    8,405.04x = 12,608.24 × 2,856.16
  4. Step 4: Simplify right side
    8,405.04x = 36,011,150.76
  5. Step 5: Solve for x
    x = 36,011,150.76/8,405.04
  6. Step 6: Final answer
    x = 4,284.47

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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.