Home / 31,369.32-43,309.80-20,773.20

Finding the Fourth Proportional to 31,369.32, 43,309.80 and 20,773.20

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Solution

The fourth proportional to 31,369.32, 43,309.80 and 20,773.20 is: 28,680.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,369.32 : 43,309.80 = 20,773.20 : x
  2. Step 2: Convert to fraction form
    31,369.32/43,309.80 = 20,773.20/x
  3. Step 3: Cross multiply
    31,369.32x = 43,309.80 × 20,773.20
  4. Step 4: Simplify right side
    31,369.32x = 899,683,137.36
  5. Step 5: Solve for x
    x = 899,683,137.36/31,369.32
  6. Step 6: Final answer
    x = 28,680.35

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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.