Home / 13,152.72-18,138.44-8,438.48

Finding the Fourth Proportional to 13,152.72, 18,138.44 and 8,438.48

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Solution

The fourth proportional to 13,152.72, 18,138.44 and 8,438.48 is: 11,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,152.72 : 18,138.44 = 8,438.48 : x
  2. Step 2: Convert to fraction form
    13,152.72/18,138.44 = 8,438.48/x
  3. Step 3: Cross multiply
    13,152.72x = 18,138.44 × 8,438.48
  4. Step 4: Simplify right side
    13,152.72x = 153,060,863.17
  5. Step 5: Solve for x
    x = 153,060,863.17/13,152.72
  6. Step 6: Final answer
    x = 11,637.20

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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.