Home / 19,890.81-27,449.51-10,938.37

Finding the Fourth Proportional to 19,890.81, 27,449.51 and 10,938.37

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Solution

The fourth proportional to 19,890.81, 27,449.51 and 10,938.37 is: 15,095.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.81 : 27,449.51 = 10,938.37 : x
  2. Step 2: Convert to fraction form
    19,890.81/27,449.51 = 10,938.37/x
  3. Step 3: Cross multiply
    19,890.81x = 27,449.51 × 10,938.37
  4. Step 4: Simplify right side
    19,890.81x = 300,252,896.70
  5. Step 5: Solve for x
    x = 300,252,896.70/19,890.81
  6. Step 6: Final answer
    x = 15,095.06

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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.