Home / 13,160.05-18,160.09-7,190.53

Finding the Fourth Proportional to 13,160.05, 18,160.09 and 7,190.53

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Solution

The fourth proportional to 13,160.05, 18,160.09 and 7,190.53 is: 9,922.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,160.05 : 18,160.09 = 7,190.53 : x
  2. Step 2: Convert to fraction form
    13,160.05/18,160.09 = 7,190.53/x
  3. Step 3: Cross multiply
    13,160.05x = 18,160.09 × 7,190.53
  4. Step 4: Simplify right side
    13,160.05x = 130,580,671.95
  5. Step 5: Solve for x
    x = 130,580,671.95/13,160.05
  6. Step 6: Final answer
    x = 9,922.51

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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.