Home / 21,298.14-31,947.09-11,938.20

Finding the Fourth Proportional to 21,298.14, 31,947.09 and 11,938.20

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Solution

The fourth proportional to 21,298.14, 31,947.09 and 11,938.20 is: 17,907.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.14 : 31,947.09 = 11,938.20 : x
  2. Step 2: Convert to fraction form
    21,298.14/31,947.09 = 11,938.20/x
  3. Step 3: Cross multiply
    21,298.14x = 31,947.09 × 11,938.20
  4. Step 4: Simplify right side
    21,298.14x = 381,390,749.84
  5. Step 5: Solve for x
    x = 381,390,749.84/21,298.14
  6. Step 6: Final answer
    x = 17,907.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.