Home / 20,825.84-31,242.36-9,140.24

Finding the Fourth Proportional to 20,825.84, 31,242.36 and 9,140.24

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Solution

The fourth proportional to 20,825.84, 31,242.36 and 9,140.24 is: 13,711.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.84 : 31,242.36 = 9,140.24 : x
  2. Step 2: Convert to fraction form
    20,825.84/31,242.36 = 9,140.24/x
  3. Step 3: Cross multiply
    20,825.84x = 31,242.36 × 9,140.24
  4. Step 4: Simplify right side
    20,825.84x = 285,562,668.57
  5. Step 5: Solve for x
    x = 285,562,668.57/20,825.84
  6. Step 6: Final answer
    x = 13,711.94

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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.