Home / 15,763.23-21,751.77-8,689.60

Finding the Fourth Proportional to 15,763.23, 21,751.77 and 8,689.60

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Solution

The fourth proportional to 15,763.23, 21,751.77 and 8,689.60 is: 11,990.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.23 : 21,751.77 = 8,689.60 : x
  2. Step 2: Convert to fraction form
    15,763.23/21,751.77 = 8,689.60/x
  3. Step 3: Cross multiply
    15,763.23x = 21,751.77 × 8,689.60
  4. Step 4: Simplify right side
    15,763.23x = 189,014,180.59
  5. Step 5: Solve for x
    x = 189,014,180.59/15,763.23
  6. Step 6: Final answer
    x = 11,990.83

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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.