Home / 30,359.55-41,915.70-20,815.32

Finding the Fourth Proportional to 30,359.55, 41,915.70 and 20,815.32

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Solution

The fourth proportional to 30,359.55, 41,915.70 and 20,815.32 is: 28,738.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,359.55 : 41,915.70 = 20,815.32 : x
  2. Step 2: Convert to fraction form
    30,359.55/41,915.70 = 20,815.32/x
  3. Step 3: Cross multiply
    30,359.55x = 41,915.70 × 20,815.32
  4. Step 4: Simplify right side
    30,359.55x = 872,488,708.52
  5. Step 5: Solve for x
    x = 872,488,708.52/30,359.55
  6. Step 6: Final answer
    x = 28,738.53

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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.