Home / 53,490.40-80,205.23-20,211.55

Finding the Fourth Proportional to 53,490.40, 80,205.23 and 20,211.55

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Solution

The fourth proportional to 53,490.40, 80,205.23 and 20,211.55 is: 30,305.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,490.40 : 80,205.23 = 20,211.55 : x
  2. Step 2: Convert to fraction form
    53,490.40/80,205.23 = 20,211.55/x
  3. Step 3: Cross multiply
    53,490.40x = 80,205.23 × 20,211.55
  4. Step 4: Simplify right side
    53,490.40x = 1,621,071,915.35
  5. Step 5: Solve for x
    x = 1,621,071,915.35/53,490.40
  6. Step 6: Final answer
    x = 30,305.85

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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.