Home / 21,210.45-31,816.13-6,419.34

Finding the Fourth Proportional to 21,210.45, 31,816.13 and 6,419.34

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Solution

The fourth proportional to 21,210.45, 31,816.13 and 6,419.34 is: 9,629.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.45 : 31,816.13 = 6,419.34 : x
  2. Step 2: Convert to fraction form
    21,210.45/31,816.13 = 6,419.34/x
  3. Step 3: Cross multiply
    21,210.45x = 31,816.13 × 6,419.34
  4. Step 4: Simplify right side
    21,210.45x = 204,238,523.86
  5. Step 5: Solve for x
    x = 204,238,523.86/21,210.45
  6. Step 6: Final answer
    x = 9,629.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.