Home / 19,890.70-27,448.90-10,938.12

Finding the Fourth Proportional to 19,890.70, 27,448.90 and 10,938.12

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Solution

The fourth proportional to 19,890.70, 27,448.90 and 10,938.12 is: 15,094.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.70 : 27,448.90 = 10,938.12 : x
  2. Step 2: Convert to fraction form
    19,890.70/27,448.90 = 10,938.12/x
  3. Step 3: Cross multiply
    19,890.70x = 27,448.90 × 10,938.12
  4. Step 4: Simplify right side
    19,890.70x = 300,239,362.07
  5. Step 5: Solve for x
    x = 300,239,362.07/19,890.70
  6. Step 6: Final answer
    x = 15,094.46

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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.