Home / 19,889.28-27,440.64-11,499.84

Finding the Fourth Proportional to 19,889.28, 27,440.64 and 11,499.84

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Solution

The fourth proportional to 19,889.28, 27,440.64 and 11,499.84 is: 15,865.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.28 : 27,440.64 = 11,499.84 : x
  2. Step 2: Convert to fraction form
    19,889.28/27,440.64 = 11,499.84/x
  3. Step 3: Cross multiply
    19,889.28x = 27,440.64 × 11,499.84
  4. Step 4: Simplify right side
    19,889.28x = 315,562,969.50
  5. Step 5: Solve for x
    x = 315,562,969.50/19,889.28
  6. Step 6: Final answer
    x = 15,865.98

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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.