Home / 21,208.56-31,735.08-20,690.16

Finding the Fourth Proportional to 21,208.56, 31,735.08 and 20,690.16

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Solution

The fourth proportional to 21,208.56, 31,735.08 and 20,690.16 is: 30,959.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.56 : 31,735.08 = 20,690.16 : x
  2. Step 2: Convert to fraction form
    21,208.56/31,735.08 = 20,690.16/x
  3. Step 3: Cross multiply
    21,208.56x = 31,735.08 × 20,690.16
  4. Step 4: Simplify right side
    21,208.56x = 656,603,882.81
  5. Step 5: Solve for x
    x = 656,603,882.81/21,208.56
  6. Step 6: Final answer
    x = 30,959.38

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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.