Home / 15,489.82-21,376.27-8,416.70

Finding the Fourth Proportional to 15,489.82, 21,376.27 and 8,416.70

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Solution

The fourth proportional to 15,489.82, 21,376.27 and 8,416.70 is: 11,615.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.82 : 21,376.27 = 8,416.70 : x
  2. Step 2: Convert to fraction form
    15,489.82/21,376.27 = 8,416.70/x
  3. Step 3: Cross multiply
    15,489.82x = 21,376.27 × 8,416.70
  4. Step 4: Simplify right side
    15,489.82x = 179,917,651.71
  5. Step 5: Solve for x
    x = 179,917,651.71/15,489.82
  6. Step 6: Final answer
    x = 11,615.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.