Home / 28,909.44-39,901.70-18,820.32

Finding the Fourth Proportional to 28,909.44, 39,901.70 and 18,820.32

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Solution

The fourth proportional to 28,909.44, 39,901.70 and 18,820.32 is: 25,976.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,909.44 : 39,901.70 = 18,820.32 : x
  2. Step 2: Convert to fraction form
    28,909.44/39,901.70 = 18,820.32/x
  3. Step 3: Cross multiply
    28,909.44x = 39,901.70 × 18,820.32
  4. Step 4: Simplify right side
    28,909.44x = 750,962,659.96
  5. Step 5: Solve for x
    x = 750,962,659.96/28,909.44
  6. Step 6: Final answer
    x = 25,976.38

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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.