Home / 15,457.32-21,331.09-8,383.79

Finding the Fourth Proportional to 15,457.32, 21,331.09 and 8,383.79

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Solution

The fourth proportional to 15,457.32, 21,331.09 and 8,383.79 is: 11,569.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,457.32 : 21,331.09 = 8,383.79 : x
  2. Step 2: Convert to fraction form
    15,457.32/21,331.09 = 8,383.79/x
  3. Step 3: Cross multiply
    15,457.32x = 21,331.09 × 8,383.79
  4. Step 4: Simplify right side
    15,457.32x = 178,835,272.38
  5. Step 5: Solve for x
    x = 178,835,272.38/15,457.32
  6. Step 6: Final answer
    x = 11,569.62

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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.