Home / 13,537.08-18,681.28-7,872.12

Finding the Fourth Proportional to 13,537.08, 18,681.28 and 7,872.12

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Solution

The fourth proportional to 13,537.08, 18,681.28 and 7,872.12 is: 10,863.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,537.08 : 18,681.28 = 7,872.12 : x
  2. Step 2: Convert to fraction form
    13,537.08/18,681.28 = 7,872.12/x
  3. Step 3: Cross multiply
    13,537.08x = 18,681.28 × 7,872.12
  4. Step 4: Simplify right side
    13,537.08x = 147,061,277.91
  5. Step 5: Solve for x
    x = 147,061,277.91/13,537.08
  6. Step 6: Final answer
    x = 10,863.59

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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.