Home / 13,612.88-18,785.40-7,644.56

Finding the Fourth Proportional to 13,612.88, 18,785.40 and 7,644.56

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Solution

The fourth proportional to 13,612.88, 18,785.40 and 7,644.56 is: 10,549.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.88 : 18,785.40 = 7,644.56 : x
  2. Step 2: Convert to fraction form
    13,612.88/18,785.40 = 7,644.56/x
  3. Step 3: Cross multiply
    13,612.88x = 18,785.40 × 7,644.56
  4. Step 4: Simplify right side
    13,612.88x = 143,606,117.42
  5. Step 5: Solve for x
    x = 143,606,117.42/13,612.88
  6. Step 6: Final answer
    x = 10,549.28

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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.