Home / 31,560.08-43,539.72-20,955.44

Finding the Fourth Proportional to 31,560.08, 43,539.72 and 20,955.44

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Solution

The fourth proportional to 31,560.08, 43,539.72 and 20,955.44 is: 28,909.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,560.08 : 43,539.72 = 20,955.44 : x
  2. Step 2: Convert to fraction form
    31,560.08/43,539.72 = 20,955.44/x
  3. Step 3: Cross multiply
    31,560.08x = 43,539.72 × 20,955.44
  4. Step 4: Simplify right side
    31,560.08x = 912,393,990.08
  5. Step 5: Solve for x
    x = 912,393,990.08/31,560.08
  6. Step 6: Final answer
    x = 28,909.75

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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.