Home / 13,506.38-18,639.40-7,538.08

Finding the Fourth Proportional to 13,506.38, 18,639.40 and 7,538.08

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Solution

The fourth proportional to 13,506.38, 18,639.40 and 7,538.08 is: 10,402.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,506.38 : 18,639.40 = 7,538.08 : x
  2. Step 2: Convert to fraction form
    13,506.38/18,639.40 = 7,538.08/x
  3. Step 3: Cross multiply
    13,506.38x = 18,639.40 × 7,538.08
  4. Step 4: Simplify right side
    13,506.38x = 140,505,288.35
  5. Step 5: Solve for x
    x = 140,505,288.35/13,506.38
  6. Step 6: Final answer
    x = 10,402.88

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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.