Home / 15,763.31-21,754.32-8,689.70

Finding the Fourth Proportional to 15,763.31, 21,754.32 and 8,689.70

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Solution

The fourth proportional to 15,763.31, 21,754.32 and 8,689.70 is: 11,992.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.31 : 21,754.32 = 8,689.70 : x
  2. Step 2: Convert to fraction form
    15,763.31/21,754.32 = 8,689.70/x
  3. Step 3: Cross multiply
    15,763.31x = 21,754.32 × 8,689.70
  4. Step 4: Simplify right side
    15,763.31x = 189,038,514.50
  5. Step 5: Solve for x
    x = 189,038,514.50/15,763.31
  6. Step 6: Final answer
    x = 11,992.31

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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.