Home / 15,689.58-21,651.75-8,615.94

Finding the Fourth Proportional to 15,689.58, 21,651.75 and 8,615.94

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Solution

The fourth proportional to 15,689.58, 21,651.75 and 8,615.94 is: 11,890.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.58 : 21,651.75 = 8,615.94 : x
  2. Step 2: Convert to fraction form
    15,689.58/21,651.75 = 8,615.94/x
  3. Step 3: Cross multiply
    15,689.58x = 21,651.75 × 8,615.94
  4. Step 4: Simplify right side
    15,689.58x = 186,550,178.90
  5. Step 5: Solve for x
    x = 186,550,178.90/15,689.58
  6. Step 6: Final answer
    x = 11,890.07

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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.