Home / 19,889.40-27,445.72-11,711.68

Finding the Fourth Proportional to 19,889.40, 27,445.72 and 11,711.68

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Solution

The fourth proportional to 19,889.40, 27,445.72 and 11,711.68 is: 16,161.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,889.40 : 27,445.72 = 11,711.68 : x
  2. Step 2: Convert to fraction form
    19,889.40/27,445.72 = 11,711.68/x
  3. Step 3: Cross multiply
    19,889.40x = 27,445.72 × 11,711.68
  4. Step 4: Simplify right side
    19,889.40x = 321,435,490.01
  5. Step 5: Solve for x
    x = 321,435,490.01/19,889.40
  6. Step 6: Final answer
    x = 16,161.15

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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.