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Finding the Fourth Proportional to 28,735.20, 43,102.80 and 12,351.20

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Solution

The fourth proportional to 28,735.20, 43,102.80 and 12,351.20 is: 18,526.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,735.20 : 43,102.80 = 12,351.20 : x
  2. Step 2: Convert to fraction form
    28,735.20/43,102.80 = 12,351.20/x
  3. Step 3: Cross multiply
    28,735.20x = 43,102.80 × 12,351.20
  4. Step 4: Simplify right side
    28,735.20x = 532,371,303.36
  5. Step 5: Solve for x
    x = 532,371,303.36/28,735.20
  6. Step 6: Final answer
    x = 18,526.80

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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.