Home / 28,939.70-43,378.79-13,937.47

Finding the Fourth Proportional to 28,939.70, 43,378.79 and 13,937.47

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Solution

The fourth proportional to 28,939.70, 43,378.79 and 13,937.47 is: 20,891.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.70 : 43,378.79 = 13,937.47 : x
  2. Step 2: Convert to fraction form
    28,939.70/43,378.79 = 13,937.47/x
  3. Step 3: Cross multiply
    28,939.70x = 43,378.79 × 13,937.47
  4. Step 4: Simplify right side
    28,939.70x = 604,590,510.66
  5. Step 5: Solve for x
    x = 604,590,510.66/28,939.70
  6. Step 6: Final answer
    x = 20,891.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.