Home / 13,612.47-20,426.49-5,291.40

Finding the Fourth Proportional to 13,612.47, 20,426.49 and 5,291.40

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Solution

The fourth proportional to 13,612.47, 20,426.49 and 5,291.40 is: 7,940.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.47 : 20,426.49 = 5,291.40 : x
  2. Step 2: Convert to fraction form
    13,612.47/20,426.49 = 5,291.40/x
  3. Step 3: Cross multiply
    13,612.47x = 20,426.49 × 5,291.40
  4. Step 4: Simplify right side
    13,612.47x = 108,084,729.19
  5. Step 5: Solve for x
    x = 108,084,729.19/13,612.47
  6. Step 6: Final answer
    x = 7,940.13

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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.