Home / 15,490.36-21,376.68-8,416.74

Finding the Fourth Proportional to 15,490.36, 21,376.68 and 8,416.74

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Solution

The fourth proportional to 15,490.36, 21,376.68 and 8,416.74 is: 11,615.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.36 : 21,376.68 = 8,416.74 : x
  2. Step 2: Convert to fraction form
    15,490.36/21,376.68 = 8,416.74/x
  3. Step 3: Cross multiply
    15,490.36x = 21,376.68 × 8,416.74
  4. Step 4: Simplify right side
    15,490.36x = 179,921,957.62
  5. Step 5: Solve for x
    x = 179,921,957.62/15,490.36
  6. Step 6: Final answer
    x = 11,615.09

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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.