Home / 21,191.79-31,786.91-6,400.32

Finding the Fourth Proportional to 21,191.79, 31,786.91 and 6,400.32

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Solution

The fourth proportional to 21,191.79, 31,786.91 and 6,400.32 is: 9,600.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.79 : 31,786.91 = 6,400.32 : x
  2. Step 2: Convert to fraction form
    21,191.79/31,786.91 = 6,400.32/x
  3. Step 3: Cross multiply
    21,191.79x = 31,786.91 × 6,400.32
  4. Step 4: Simplify right side
    21,191.79x = 203,446,443.28
  5. Step 5: Solve for x
    x = 203,446,443.28/21,191.79
  6. Step 6: Final answer
    x = 9,600.25

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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.