Home / 12,478.80-18,721.74-4,164.24

Finding the Fourth Proportional to 12,478.80, 18,721.74 and 4,164.24

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Solution

The fourth proportional to 12,478.80, 18,721.74 and 4,164.24 is: 6,247.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.80 : 18,721.74 = 4,164.24 : x
  2. Step 2: Convert to fraction form
    12,478.80/18,721.74 = 4,164.24/x
  3. Step 3: Cross multiply
    12,478.80x = 18,721.74 × 4,164.24
  4. Step 4: Simplify right side
    12,478.80x = 77,961,818.58
  5. Step 5: Solve for x
    x = 77,961,818.58/12,478.80
  6. Step 6: Final answer
    x = 6,247.54

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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.