Home / 13,513.47-20,270.21-4,278.75

Finding the Fourth Proportional to 13,513.47, 20,270.21 and 4,278.75

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Solution

The fourth proportional to 13,513.47, 20,270.21 and 4,278.75 is: 6,418.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,513.47 : 20,270.21 = 4,278.75 : x
  2. Step 2: Convert to fraction form
    13,513.47/20,270.21 = 4,278.75/x
  3. Step 3: Cross multiply
    13,513.47x = 20,270.21 × 4,278.75
  4. Step 4: Simplify right side
    13,513.47x = 86,731,139.64
  5. Step 5: Solve for x
    x = 86,731,139.64/13,513.47
  6. Step 6: Final answer
    x = 6,418.13

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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.