Home / 13,121.69-18,107.70-7,152.99

Finding the Fourth Proportional to 13,121.69, 18,107.70 and 7,152.99

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Solution

The fourth proportional to 13,121.69, 18,107.70 and 7,152.99 is: 9,871.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.69 : 18,107.70 = 7,152.99 : x
  2. Step 2: Convert to fraction form
    13,121.69/18,107.70 = 7,152.99/x
  3. Step 3: Cross multiply
    13,121.69x = 18,107.70 × 7,152.99
  4. Step 4: Simplify right side
    13,121.69x = 129,524,197.02
  5. Step 5: Solve for x
    x = 129,524,197.02/13,121.69
  6. Step 6: Final answer
    x = 9,871.00

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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.