Home / 21,431.40-32,335.61-20,695.08

Finding the Fourth Proportional to 21,431.40, 32,335.61 and 20,695.08

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Solution

The fourth proportional to 21,431.40, 32,335.61 and 20,695.08 is: 31,224.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.40 : 32,335.61 = 20,695.08 : x
  2. Step 2: Convert to fraction form
    21,431.40/32,335.61 = 20,695.08/x
  3. Step 3: Cross multiply
    21,431.40x = 32,335.61 × 20,695.08
  4. Step 4: Simplify right side
    21,431.40x = 669,187,932.32
  5. Step 5: Solve for x
    x = 669,187,932.32/21,431.40
  6. Step 6: Final answer
    x = 31,224.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.