Home / 15,763.91-21,754.26-8,690.81

Finding the Fourth Proportional to 15,763.91, 21,754.26 and 8,690.81

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Solution

The fourth proportional to 15,763.91, 21,754.26 and 8,690.81 is: 11,993.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.91 : 21,754.26 = 8,690.81 : x
  2. Step 2: Convert to fraction form
    15,763.91/21,754.26 = 8,690.81/x
  3. Step 3: Cross multiply
    15,763.91x = 21,754.26 × 8,690.81
  4. Step 4: Simplify right side
    15,763.91x = 189,062,031.58
  5. Step 5: Solve for x
    x = 189,062,031.58/15,763.91
  6. Step 6: Final answer
    x = 11,993.35

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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.