Home / 20,986.84-31,485.71-9,297.28

Finding the Fourth Proportional to 20,986.84, 31,485.71 and 9,297.28

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Solution

The fourth proportional to 20,986.84, 31,485.71 and 9,297.28 is: 13,948.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.84 : 31,485.71 = 9,297.28 : x
  2. Step 2: Convert to fraction form
    20,986.84/31,485.71 = 9,297.28/x
  3. Step 3: Cross multiply
    20,986.84x = 31,485.71 × 9,297.28
  4. Step 4: Simplify right side
    20,986.84x = 292,731,461.87
  5. Step 5: Solve for x
    x = 292,731,461.87/20,986.84
  6. Step 6: Final answer
    x = 13,948.33

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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.