Home / 13,546.38-18,686.48-7,880.49

Finding the Fourth Proportional to 13,546.38, 18,686.48 and 7,880.49

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Solution

The fourth proportional to 13,546.38, 18,686.48 and 7,880.49 is: 10,870.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,546.38 : 18,686.48 = 7,880.49 : x
  2. Step 2: Convert to fraction form
    13,546.38/18,686.48 = 7,880.49/x
  3. Step 3: Cross multiply
    13,546.38x = 18,686.48 × 7,880.49
  4. Step 4: Simplify right side
    13,546.38x = 147,258,618.78
  5. Step 5: Solve for x
    x = 147,258,618.78/13,546.38
  6. Step 6: Final answer
    x = 10,870.70

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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.