Home / 21,074.36-31,587.23-7,918.34

Finding the Fourth Proportional to 21,074.36, 31,587.23 and 7,918.34

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Solution

The fourth proportional to 21,074.36, 31,587.23 and 7,918.34 is: 11,868.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.36 : 31,587.23 = 7,918.34 : x
  2. Step 2: Convert to fraction form
    21,074.36/31,587.23 = 7,918.34/x
  3. Step 3: Cross multiply
    21,074.36x = 31,587.23 × 7,918.34
  4. Step 4: Simplify right side
    21,074.36x = 250,118,288.66
  5. Step 5: Solve for x
    x = 250,118,288.66/21,074.36
  6. Step 6: Final answer
    x = 11,868.37

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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.