Home / 13,122.49-18,108.93-7,154.05

Finding the Fourth Proportional to 13,122.49, 18,108.93 and 7,154.05

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Solution

The fourth proportional to 13,122.49, 18,108.93 and 7,154.05 is: 9,872.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.49 : 18,108.93 = 7,154.05 : x
  2. Step 2: Convert to fraction form
    13,122.49/18,108.93 = 7,154.05/x
  3. Step 3: Cross multiply
    13,122.49x = 18,108.93 × 7,154.05
  4. Step 4: Simplify right side
    13,122.49x = 129,552,190.67
  5. Step 5: Solve for x
    x = 129,552,190.67/13,122.49
  6. Step 6: Final answer
    x = 9,872.53

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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.