Home / 13,125.72-18,113.58-7,157.48

Finding the Fourth Proportional to 13,125.72, 18,113.58 and 7,157.48

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Solution

The fourth proportional to 13,125.72, 18,113.58 and 7,157.48 is: 9,877.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.72 : 18,113.58 = 7,157.48 : x
  2. Step 2: Convert to fraction form
    13,125.72/18,113.58 = 7,157.48/x
  3. Step 3: Cross multiply
    13,125.72x = 18,113.58 × 7,157.48
  4. Step 4: Simplify right side
    13,125.72x = 129,647,586.58
  5. Step 5: Solve for x
    x = 129,647,586.58/13,125.72
  6. Step 6: Final answer
    x = 9,877.37

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Double scale
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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.