Home / 13,239.40-18,274.26-8,525.20

Finding the Fourth Proportional to 13,239.40, 18,274.26 and 8,525.20

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Solution

The fourth proportional to 13,239.40, 18,274.26 and 8,525.20 is: 11,767.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.40 : 18,274.26 = 8,525.20 : x
  2. Step 2: Convert to fraction form
    13,239.40/18,274.26 = 8,525.20/x
  3. Step 3: Cross multiply
    13,239.40x = 18,274.26 × 8,525.20
  4. Step 4: Simplify right side
    13,239.40x = 155,791,721.35
  5. Step 5: Solve for x
    x = 155,791,721.35/13,239.40
  6. Step 6: Final answer
    x = 11,767.28

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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.