Home / 15,689.30-21,651.37-8,615.77

Finding the Fourth Proportional to 15,689.30, 21,651.37 and 8,615.77

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Solution

The fourth proportional to 15,689.30, 21,651.37 and 8,615.77 is: 11,889.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.30 : 21,651.37 = 8,615.77 : x
  2. Step 2: Convert to fraction form
    15,689.30/21,651.37 = 8,615.77/x
  3. Step 3: Cross multiply
    15,689.30x = 21,651.37 × 8,615.77
  4. Step 4: Simplify right side
    15,689.30x = 186,543,148.44
  5. Step 5: Solve for x
    x = 186,543,148.44/15,689.30
  6. Step 6: Final answer
    x = 11,889.84

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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.