Home / 8,275.20-12,412.80-7,641.60

Finding the Fourth Proportional to 8,275.20, 12,412.80 and 7,641.60

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Solution

The fourth proportional to 8,275.20, 12,412.80 and 7,641.60 is: 11,462.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,275.20 : 12,412.80 = 7,641.60 : x
  2. Step 2: Convert to fraction form
    8,275.20/12,412.80 = 7,641.60/x
  3. Step 3: Cross multiply
    8,275.20x = 12,412.80 × 7,641.60
  4. Step 4: Simplify right side
    8,275.20x = 94,853,652.48
  5. Step 5: Solve for x
    x = 94,853,652.48/8,275.20
  6. Step 6: Final answer
    x = 11,462.40

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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.