Home / 30,438.40-45,657.60-8,255.20

Finding the Fourth Proportional to 30,438.40, 45,657.60 and 8,255.20

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Solution

The fourth proportional to 30,438.40, 45,657.60 and 8,255.20 is: 12,382.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,438.40 : 45,657.60 = 8,255.20 : x
  2. Step 2: Convert to fraction form
    30,438.40/45,657.60 = 8,255.20/x
  3. Step 3: Cross multiply
    30,438.40x = 45,657.60 × 8,255.20
  4. Step 4: Simplify right side
    30,438.40x = 376,912,619.52
  5. Step 5: Solve for x
    x = 376,912,619.52/30,438.40
  6. Step 6: Final answer
    x = 12,382.80

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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.