Home / 28,505.84-39,337.80-15,759.20

Finding the Fourth Proportional to 28,505.84, 39,337.80 and 15,759.20

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Solution

The fourth proportional to 28,505.84, 39,337.80 and 15,759.20 is: 21,747.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.84 : 39,337.80 = 15,759.20 : x
  2. Step 2: Convert to fraction form
    28,505.84/39,337.80 = 15,759.20/x
  3. Step 3: Cross multiply
    28,505.84x = 39,337.80 × 15,759.20
  4. Step 4: Simplify right side
    28,505.84x = 619,932,257.76
  5. Step 5: Solve for x
    x = 619,932,257.76/28,505.84
  6. Step 6: Final answer
    x = 21,747.55

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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.