Home / 31,031.26-42,773.36-20,956.48

Finding the Fourth Proportional to 31,031.26, 42,773.36 and 20,956.48

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Solution

The fourth proportional to 31,031.26, 42,773.36 and 20,956.48 is: 28,886.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,031.26 : 42,773.36 = 20,956.48 : x
  2. Step 2: Convert to fraction form
    31,031.26/42,773.36 = 20,956.48/x
  3. Step 3: Cross multiply
    31,031.26x = 42,773.36 × 20,956.48
  4. Step 4: Simplify right side
    31,031.26x = 896,379,063.37
  5. Step 5: Solve for x
    x = 896,379,063.37/31,031.26
  6. Step 6: Final answer
    x = 28,886.33

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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.