Home / 21,055.12-31,584.36-12,290.92

Finding the Fourth Proportional to 21,055.12, 31,584.36 and 12,290.92

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Solution

The fourth proportional to 21,055.12, 31,584.36 and 12,290.92 is: 18,437.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,055.12 : 31,584.36 = 12,290.92 : x
  2. Step 2: Convert to fraction form
    21,055.12/31,584.36 = 12,290.92/x
  3. Step 3: Cross multiply
    21,055.12x = 31,584.36 × 12,290.92
  4. Step 4: Simplify right side
    21,055.12x = 388,200,842.01
  5. Step 5: Solve for x
    x = 388,200,842.01/21,055.12
  6. Step 6: Final answer
    x = 18,437.36

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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.