Home / 31,779.81-43,864.20-21,712.32

Finding the Fourth Proportional to 31,779.81, 43,864.20 and 21,712.32

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Solution

The fourth proportional to 31,779.81, 43,864.20 and 21,712.32 is: 29,968.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,779.81 : 43,864.20 = 21,712.32 : x
  2. Step 2: Convert to fraction form
    31,779.81/43,864.20 = 21,712.32/x
  3. Step 3: Cross multiply
    31,779.81x = 43,864.20 × 21,712.32
  4. Step 4: Simplify right side
    31,779.81x = 952,393,546.94
  5. Step 5: Solve for x
    x = 952,393,546.94/31,779.81
  6. Step 6: Final answer
    x = 29,968.51

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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.