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Finding the Fourth Proportional to 43,830.30, 65,745.45 and 15,763.80

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Solution

The fourth proportional to 43,830.30, 65,745.45 and 15,763.80 is: 23,645.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,830.30 : 65,745.45 = 15,763.80 : x
  2. Step 2: Convert to fraction form
    43,830.30/65,745.45 = 15,763.80/x
  3. Step 3: Cross multiply
    43,830.30x = 65,745.45 × 15,763.80
  4. Step 4: Simplify right side
    43,830.30x = 1,036,398,124.71
  5. Step 5: Solve for x
    x = 1,036,398,124.71/43,830.30
  6. Step 6: Final answer
    x = 23,645.70

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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.