Home / 13,612.36-20,421.78-5,292.58

Finding the Fourth Proportional to 13,612.36, 20,421.78 and 5,292.58

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Solution

The fourth proportional to 13,612.36, 20,421.78 and 5,292.58 is: 7,940.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.36 : 20,421.78 = 5,292.58 : x
  2. Step 2: Convert to fraction form
    13,612.36/20,421.78 = 5,292.58/x
  3. Step 3: Cross multiply
    13,612.36x = 20,421.78 × 5,292.58
  4. Step 4: Simplify right side
    13,612.36x = 108,083,904.39
  5. Step 5: Solve for x
    x = 108,083,904.39/13,612.36
  6. Step 6: Final answer
    x = 7,940.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.