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Finding the Fourth Proportional to 14,825.87, 20,453.54 and 9,719.99

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Solution

The fourth proportional to 14,825.87, 20,453.54 and 9,719.99 is: 13,409.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,825.87 : 20,453.54 = 9,719.99 : x
  2. Step 2: Convert to fraction form
    14,825.87/20,453.54 = 9,719.99/x
  3. Step 3: Cross multiply
    14,825.87x = 20,453.54 × 9,719.99
  4. Step 4: Simplify right side
    14,825.87x = 198,808,053.40
  5. Step 5: Solve for x
    x = 198,808,053.40/14,825.87
  6. Step 6: Final answer
    x = 13,409.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.