Home / 19,890.81-27,450.02-10,939.01

Finding the Fourth Proportional to 19,890.81, 27,450.02 and 10,939.01

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Solution

The fourth proportional to 19,890.81, 27,450.02 and 10,939.01 is: 15,096.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.81 : 27,450.02 = 10,939.01 : x
  2. Step 2: Convert to fraction form
    19,890.81/27,450.02 = 10,939.01/x
  3. Step 3: Cross multiply
    19,890.81x = 27,450.02 × 10,939.01
  4. Step 4: Simplify right side
    19,890.81x = 300,275,933.38
  5. Step 5: Solve for x
    x = 300,275,933.38/19,890.81
  6. Step 6: Final answer
    x = 15,096.21

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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.