Home / 28,128.78-38,816.67-15,553.74

Finding the Fourth Proportional to 28,128.78, 38,816.67 and 15,553.74

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Solution

The fourth proportional to 28,128.78, 38,816.67 and 15,553.74 is: 21,463.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.78 : 38,816.67 = 15,553.74 : x
  2. Step 2: Convert to fraction form
    28,128.78/38,816.67 = 15,553.74/x
  3. Step 3: Cross multiply
    28,128.78x = 38,816.67 × 15,553.74
  4. Step 4: Simplify right side
    28,128.78x = 603,744,392.85
  5. Step 5: Solve for x
    x = 603,744,392.85/28,128.78
  6. Step 6: Final answer
    x = 21,463.58

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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.