Home / 13,125.56-18,112.88-7,157.35

Finding the Fourth Proportional to 13,125.56, 18,112.88 and 7,157.35

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Solution

The fourth proportional to 13,125.56, 18,112.88 and 7,157.35 is: 9,876.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.56 : 18,112.88 = 7,157.35 : x
  2. Step 2: Convert to fraction form
    13,125.56/18,112.88 = 7,157.35/x
  3. Step 3: Cross multiply
    13,125.56x = 18,112.88 × 7,157.35
  4. Step 4: Simplify right side
    13,125.56x = 129,640,095.32
  5. Step 5: Solve for x
    x = 129,640,095.32/13,125.56
  6. Step 6: Final answer
    x = 9,876.92

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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.