Home / 28,240.90-42,403.20-15,785.80

Finding the Fourth Proportional to 28,240.90, 42,403.20 and 15,785.80

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Solution

The fourth proportional to 28,240.90, 42,403.20 and 15,785.80 is: 23,702.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.90 : 42,403.20 = 15,785.80 : x
  2. Step 2: Convert to fraction form
    28,240.90/42,403.20 = 15,785.80/x
  3. Step 3: Cross multiply
    28,240.90x = 42,403.20 × 15,785.80
  4. Step 4: Simplify right side
    28,240.90x = 669,368,434.56
  5. Step 5: Solve for x
    x = 669,368,434.56/28,240.90
  6. Step 6: Final answer
    x = 23,702.09

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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.