Home / 15,140.85-20,896.35-9,172.62

Finding the Fourth Proportional to 15,140.85, 20,896.35 and 9,172.62

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Solution

The fourth proportional to 15,140.85, 20,896.35 and 9,172.62 is: 12,659.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,140.85 : 20,896.35 = 9,172.62 : x
  2. Step 2: Convert to fraction form
    15,140.85/20,896.35 = 9,172.62/x
  3. Step 3: Cross multiply
    15,140.85x = 20,896.35 × 9,172.62
  4. Step 4: Simplify right side
    15,140.85x = 191,674,277.94
  5. Step 5: Solve for x
    x = 191,674,277.94/15,140.85
  6. Step 6: Final answer
    x = 12,659.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.