Home / 13,122.51-18,108.82-7,154.23

Finding the Fourth Proportional to 13,122.51, 18,108.82 and 7,154.23

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Solution

The fourth proportional to 13,122.51, 18,108.82 and 7,154.23 is: 9,872.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.51 : 18,108.82 = 7,154.23 : x
  2. Step 2: Convert to fraction form
    13,122.51/18,108.82 = 7,154.23/x
  3. Step 3: Cross multiply
    13,122.51x = 18,108.82 × 7,154.23
  4. Step 4: Simplify right side
    13,122.51x = 129,554,663.31
  5. Step 5: Solve for x
    x = 129,554,663.31/13,122.51
  6. Step 6: Final answer
    x = 9,872.70

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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.