Home / 14,939.89-20,612.39-8,478.45

Finding the Fourth Proportional to 14,939.89, 20,612.39 and 8,478.45

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Solution

The fourth proportional to 14,939.89, 20,612.39 and 8,478.45 is: 11,697.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,939.89 : 20,612.39 = 8,478.45 : x
  2. Step 2: Convert to fraction form
    14,939.89/20,612.39 = 8,478.45/x
  3. Step 3: Cross multiply
    14,939.89x = 20,612.39 × 8,478.45
  4. Step 4: Simplify right side
    14,939.89x = 174,761,148.33
  5. Step 5: Solve for x
    x = 174,761,148.33/14,939.89
  6. Step 6: Final answer
    x = 11,697.62

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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.