Home / 20,942.69-28,889.87-15,898.55

Finding the Fourth Proportional to 20,942.69, 28,889.87 and 15,898.55

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Solution

The fourth proportional to 20,942.69, 28,889.87 and 15,898.55 is: 21,931.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.69 : 28,889.87 = 15,898.55 : x
  2. Step 2: Convert to fraction form
    20,942.69/28,889.87 = 15,898.55/x
  3. Step 3: Cross multiply
    20,942.69x = 28,889.87 × 15,898.55
  4. Step 4: Simplify right side
    20,942.69x = 459,306,818.75
  5. Step 5: Solve for x
    x = 459,306,818.75/20,942.69
  6. Step 6: Final answer
    x = 21,931.61

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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.