Home / 15,688.69-21,650.39-8,615.57

Finding the Fourth Proportional to 15,688.69, 21,650.39 and 8,615.57

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Solution

The fourth proportional to 15,688.69, 21,650.39 and 8,615.57 is: 11,889.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.69 : 21,650.39 = 8,615.57 : x
  2. Step 2: Convert to fraction form
    15,688.69/21,650.39 = 8,615.57/x
  3. Step 3: Cross multiply
    15,688.69x = 21,650.39 × 8,615.57
  4. Step 4: Simplify right side
    15,688.69x = 186,530,331.55
  5. Step 5: Solve for x
    x = 186,530,331.55/15,688.69
  6. Step 6: Final answer
    x = 11,889.48

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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.