Home / 36,915.40-50,948.12-20,996.78

Finding the Fourth Proportional to 36,915.40, 50,948.12 and 20,996.78

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Solution

The fourth proportional to 36,915.40, 50,948.12 and 20,996.78 is: 28,978.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,915.40 : 50,948.12 = 20,996.78 : x
  2. Step 2: Convert to fraction form
    36,915.40/50,948.12 = 20,996.78/x
  3. Step 3: Cross multiply
    36,915.40x = 50,948.12 × 20,996.78
  4. Step 4: Simplify right side
    36,915.40x = 1,069,746,212.31
  5. Step 5: Solve for x
    x = 1,069,746,212.31/36,915.40
  6. Step 6: Final answer
    x = 28,978.32

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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.