Home / 15,715.19-21,685.99-8,999.27

Finding the Fourth Proportional to 15,715.19, 21,685.99 and 8,999.27

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Solution

The fourth proportional to 15,715.19, 21,685.99 and 8,999.27 is: 12,418.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.19 : 21,685.99 = 8,999.27 : x
  2. Step 2: Convert to fraction form
    15,715.19/21,685.99 = 8,999.27/x
  3. Step 3: Cross multiply
    15,715.19x = 21,685.99 × 8,999.27
  4. Step 4: Simplify right side
    15,715.19x = 195,158,110.94
  5. Step 5: Solve for x
    x = 195,158,110.94/15,715.19
  6. Step 6: Final answer
    x = 12,418.44

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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.