Home / 20,782.10-31,163.06-9,686.18

Finding the Fourth Proportional to 20,782.10, 31,163.06 and 9,686.18

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Solution

The fourth proportional to 20,782.10, 31,163.06 and 9,686.18 is: 14,524.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.10 : 31,163.06 = 9,686.18 : x
  2. Step 2: Convert to fraction form
    20,782.10/31,163.06 = 9,686.18/x
  3. Step 3: Cross multiply
    20,782.10x = 31,163.06 × 9,686.18
  4. Step 4: Simplify right side
    20,782.10x = 301,851,008.51
  5. Step 5: Solve for x
    x = 301,851,008.51/20,782.10
  6. Step 6: Final answer
    x = 14,524.57

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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.