Home / 13,613.36-18,787.80-7,644.66

Finding the Fourth Proportional to 13,613.36, 18,787.80 and 7,644.66

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Solution

The fourth proportional to 13,613.36, 18,787.80 and 7,644.66 is: 10,550.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.36 : 18,787.80 = 7,644.66 : x
  2. Step 2: Convert to fraction form
    13,613.36/18,787.80 = 7,644.66/x
  3. Step 3: Cross multiply
    13,613.36x = 18,787.80 × 7,644.66
  4. Step 4: Simplify right side
    13,613.36x = 143,626,343.15
  5. Step 5: Solve for x
    x = 143,626,343.15/13,613.36
  6. Step 6: Final answer
    x = 10,550.40

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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.