Home / 15,689.37-21,650.05-8,615.79

Finding the Fourth Proportional to 15,689.37, 21,650.05 and 8,615.79

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Solution

The fourth proportional to 15,689.37, 21,650.05 and 8,615.79 is: 11,889.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.37 : 21,650.05 = 8,615.79 : x
  2. Step 2: Convert to fraction form
    15,689.37/21,650.05 = 8,615.79/x
  3. Step 3: Cross multiply
    15,689.37x = 21,650.05 × 8,615.79
  4. Step 4: Simplify right side
    15,689.37x = 186,532,319.60
  5. Step 5: Solve for x
    x = 186,532,319.60/15,689.37
  6. Step 6: Final answer
    x = 11,889.09

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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.