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Finding the Fourth Proportional to 8,628.80, 12,952.80 and 5,345.60

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Solution

The fourth proportional to 8,628.80, 12,952.80 and 5,345.60 is: 8,024.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,628.80 : 12,952.80 = 5,345.60 : x
  2. Step 2: Convert to fraction form
    8,628.80/12,952.80 = 5,345.60/x
  3. Step 3: Cross multiply
    8,628.80x = 12,952.80 × 5,345.60
  4. Step 4: Simplify right side
    8,628.80x = 69,240,487.68
  5. Step 5: Solve for x
    x = 69,240,487.68/8,628.80
  6. Step 6: Final answer
    x = 8,024.35

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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.