Home / 15,689.32-21,651.15-8,615.60

Finding the Fourth Proportional to 15,689.32, 21,651.15 and 8,615.60

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Solution

The fourth proportional to 15,689.32, 21,651.15 and 8,615.60 is: 11,889.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.32 : 21,651.15 = 8,615.60 : x
  2. Step 2: Convert to fraction form
    15,689.32/21,651.15 = 8,615.60/x
  3. Step 3: Cross multiply
    15,689.32x = 21,651.15 × 8,615.60
  4. Step 4: Simplify right side
    15,689.32x = 186,537,647.94
  5. Step 5: Solve for x
    x = 186,537,647.94/15,689.32
  6. Step 6: Final answer
    x = 11,889.47

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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.