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Finding the Fourth Proportional to 8,656.30, 12,987.65 and 8,336.30

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Solution

The fourth proportional to 8,656.30, 12,987.65 and 8,336.30 is: 12,507.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.30 : 12,987.65 = 8,336.30 : x
  2. Step 2: Convert to fraction form
    8,656.30/12,987.65 = 8,336.30/x
  3. Step 3: Cross multiply
    8,656.30x = 12,987.65 × 8,336.30
  4. Step 4: Simplify right side
    8,656.30x = 108,268,946.70
  5. Step 5: Solve for x
    x = 108,268,946.70/8,656.30
  6. Step 6: Final answer
    x = 12,507.53

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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.