Home / 21,185.03-31,777.73-5,390.07

Finding the Fourth Proportional to 21,185.03, 31,777.73 and 5,390.07

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Solution

The fourth proportional to 21,185.03, 31,777.73 and 5,390.07 is: 8,085.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.03 : 31,777.73 = 5,390.07 : x
  2. Step 2: Convert to fraction form
    21,185.03/31,777.73 = 5,390.07/x
  3. Step 3: Cross multiply
    21,185.03x = 31,777.73 × 5,390.07
  4. Step 4: Simplify right side
    21,185.03x = 171,284,281.36
  5. Step 5: Solve for x
    x = 171,284,281.36/21,185.03
  6. Step 6: Final answer
    x = 8,085.16

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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.