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Finding the Fourth Proportional to 15,424.80, 23,137.20 and 13,237.80

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Solution

The fourth proportional to 15,424.80, 23,137.20 and 13,237.80 is: 19,856.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424.80 : 23,137.20 = 13,237.80 : x
  2. Step 2: Convert to fraction form
    15,424.80/23,137.20 = 13,237.80/x
  3. Step 3: Cross multiply
    15,424.80x = 23,137.20 × 13,237.80
  4. Step 4: Simplify right side
    15,424.80x = 306,285,626.16
  5. Step 5: Solve for x
    x = 306,285,626.16/15,424.80
  6. Step 6: Final answer
    x = 19,856.70

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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.