Home / 12,412.40-18,621.84-6,489.68

Finding the Fourth Proportional to 12,412.40, 18,621.84 and 6,489.68

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Solution

The fourth proportional to 12,412.40, 18,621.84 and 6,489.68 is: 9,736.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,412.40 : 18,621.84 = 6,489.68 : x
  2. Step 2: Convert to fraction form
    12,412.40/18,621.84 = 6,489.68/x
  3. Step 3: Cross multiply
    12,412.40x = 18,621.84 × 6,489.68
  4. Step 4: Simplify right side
    12,412.40x = 120,849,782.61
  5. Step 5: Solve for x
    x = 120,849,782.61/12,412.40
  6. Step 6: Final answer
    x = 9,736.21

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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.