Home / 15,120.24-20,866.56-9,150.84

Finding the Fourth Proportional to 15,120.24, 20,866.56 and 9,150.84

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Solution

The fourth proportional to 15,120.24, 20,866.56 and 9,150.84 is: 12,628.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.24 : 20,866.56 = 9,150.84 : x
  2. Step 2: Convert to fraction form
    15,120.24/20,866.56 = 9,150.84/x
  3. Step 3: Cross multiply
    15,120.24x = 20,866.56 × 9,150.84
  4. Step 4: Simplify right side
    15,120.24x = 190,946,551.91
  5. Step 5: Solve for x
    x = 190,946,551.91/15,120.24
  6. Step 6: Final answer
    x = 12,628.54

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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.