Home / 15,921.42-21,965.14-9,622.86

Finding the Fourth Proportional to 15,921.42, 21,965.14 and 9,622.86

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Solution

The fourth proportional to 15,921.42, 21,965.14 and 9,622.86 is: 13,275.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,921.42 : 21,965.14 = 9,622.86 : x
  2. Step 2: Convert to fraction form
    15,921.42/21,965.14 = 9,622.86/x
  3. Step 3: Cross multiply
    15,921.42x = 21,965.14 × 9,622.86
  4. Step 4: Simplify right side
    15,921.42x = 211,367,467.10
  5. Step 5: Solve for x
    x = 211,367,467.10/15,921.42
  6. Step 6: Final answer
    x = 13,275.67

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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.