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Finding the Fourth Proportional to 8,619.32, 12,909.54 and 7,064.12

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Solution

The fourth proportional to 8,619.32, 12,909.54 and 7,064.12 is: 10,580.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.32 : 12,909.54 = 7,064.12 : x
  2. Step 2: Convert to fraction form
    8,619.32/12,909.54 = 7,064.12/x
  3. Step 3: Cross multiply
    8,619.32x = 12,909.54 × 7,064.12
  4. Step 4: Simplify right side
    8,619.32x = 91,194,539.70
  5. Step 5: Solve for x
    x = 91,194,539.70/8,619.32
  6. Step 6: Final answer
    x = 10,580.25

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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.