Home / 13,278.80-18,325.40-7,310.40

Finding the Fourth Proportional to 13,278.80, 18,325.40 and 7,310.40

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Solution

The fourth proportional to 13,278.80, 18,325.40 and 7,310.40 is: 10,088.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.80 : 18,325.40 = 7,310.40 : x
  2. Step 2: Convert to fraction form
    13,278.80/18,325.40 = 7,310.40/x
  3. Step 3: Cross multiply
    13,278.80x = 18,325.40 × 7,310.40
  4. Step 4: Simplify right side
    13,278.80x = 133,966,004.16
  5. Step 5: Solve for x
    x = 133,966,004.16/13,278.80
  6. Step 6: Final answer
    x = 10,088.71

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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.