Home / 13,346.88-18,420.46-12,908.76

Finding the Fourth Proportional to 13,346.88, 18,420.46 and 12,908.76

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Solution

The fourth proportional to 13,346.88, 18,420.46 and 12,908.76 is: 17,815.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,346.88 : 18,420.46 = 12,908.76 : x
  2. Step 2: Convert to fraction form
    13,346.88/18,420.46 = 12,908.76/x
  3. Step 3: Cross multiply
    13,346.88x = 18,420.46 × 12,908.76
  4. Step 4: Simplify right side
    13,346.88x = 237,785,297.23
  5. Step 5: Solve for x
    x = 237,785,297.23/13,346.88
  6. Step 6: Final answer
    x = 17,815.80

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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.