Home / 31,764.50-43,815.92-21,009.63

Finding the Fourth Proportional to 31,764.50, 43,815.92 and 21,009.63

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Solution

The fourth proportional to 31,764.50, 43,815.92 and 21,009.63 is: 28,980.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,764.50 : 43,815.92 = 21,009.63 : x
  2. Step 2: Convert to fraction form
    31,764.50/43,815.92 = 21,009.63/x
  3. Step 3: Cross multiply
    31,764.50x = 43,815.92 × 21,009.63
  4. Step 4: Simplify right side
    31,764.50x = 920,556,162.26
  5. Step 5: Solve for x
    x = 920,556,162.26/31,764.50
  6. Step 6: Final answer
    x = 28,980.66

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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.