Home / 15,315.92-21,135.22-8,600.72

Finding the Fourth Proportional to 15,315.92, 21,135.22 and 8,600.72

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Solution

The fourth proportional to 15,315.92, 21,135.22 and 8,600.72 is: 11,868.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.92 : 21,135.22 = 8,600.72 : x
  2. Step 2: Convert to fraction form
    15,315.92/21,135.22 = 8,600.72/x
  3. Step 3: Cross multiply
    15,315.92x = 21,135.22 × 8,600.72
  4. Step 4: Simplify right side
    15,315.92x = 181,778,109.36
  5. Step 5: Solve for x
    x = 181,778,109.36/15,315.92
  6. Step 6: Final answer
    x = 11,868.57

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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.