Home / 28,655.40-39,546.78-15,909.36

Finding the Fourth Proportional to 28,655.40, 39,546.78 and 15,909.36

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Solution

The fourth proportional to 28,655.40, 39,546.78 and 15,909.36 is: 21,956.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,655.40 : 39,546.78 = 15,909.36 : x
  2. Step 2: Convert to fraction form
    28,655.40/39,546.78 = 15,909.36/x
  3. Step 3: Cross multiply
    28,655.40x = 39,546.78 × 15,909.36
  4. Step 4: Simplify right side
    28,655.40x = 629,163,959.86
  5. Step 5: Solve for x
    x = 629,163,959.86/28,655.40
  6. Step 6: Final answer
    x = 21,956.21

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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.