Home / 12,148.28-18,212.40-5,485.20

Finding the Fourth Proportional to 12,148.28, 18,212.40 and 5,485.20

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Solution

The fourth proportional to 12,148.28, 18,212.40 and 5,485.20 is: 8,223.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,148.28 : 18,212.40 = 5,485.20 : x
  2. Step 2: Convert to fraction form
    12,148.28/18,212.40 = 5,485.20/x
  3. Step 3: Cross multiply
    12,148.28x = 18,212.40 × 5,485.20
  4. Step 4: Simplify right side
    12,148.28x = 99,898,656.48
  5. Step 5: Solve for x
    x = 99,898,656.48/12,148.28
  6. Step 6: Final answer
    x = 8,223.28

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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.