Home / 28,555.50-39,423.87-18,636.78

Finding the Fourth Proportional to 28,555.50, 39,423.87 and 18,636.78

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Solution

The fourth proportional to 28,555.50, 39,423.87 and 18,636.78 is: 25,730.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.50 : 39,423.87 = 18,636.78 : x
  2. Step 2: Convert to fraction form
    28,555.50/39,423.87 = 18,636.78/x
  3. Step 3: Cross multiply
    28,555.50x = 39,423.87 × 18,636.78
  4. Step 4: Simplify right side
    28,555.50x = 734,733,991.94
  5. Step 5: Solve for x
    x = 734,733,991.94/28,555.50
  6. Step 6: Final answer
    x = 25,730.03

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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.