Home / 51,879.32-77,820.56-20,288.12

Finding the Fourth Proportional to 51,879.32, 77,820.56 and 20,288.12

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Solution

The fourth proportional to 51,879.32, 77,820.56 and 20,288.12 is: 30,432.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,879.32 : 77,820.56 = 20,288.12 : x
  2. Step 2: Convert to fraction form
    51,879.32/77,820.56 = 20,288.12/x
  3. Step 3: Cross multiply
    51,879.32x = 77,820.56 × 20,288.12
  4. Step 4: Simplify right side
    51,879.32x = 1,578,832,859.75
  5. Step 5: Solve for x
    x = 1,578,832,859.75/51,879.32
  6. Step 6: Final answer
    x = 30,432.80

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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.