Home / 13,107.56-18,088.46-7,139.21

Finding the Fourth Proportional to 13,107.56, 18,088.46 and 7,139.21

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Solution

The fourth proportional to 13,107.56, 18,088.46 and 7,139.21 is: 9,852.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.56 : 18,088.46 = 7,139.21 : x
  2. Step 2: Convert to fraction form
    13,107.56/18,088.46 = 7,139.21/x
  3. Step 3: Cross multiply
    13,107.56x = 18,088.46 × 7,139.21
  4. Step 4: Simplify right side
    13,107.56x = 129,137,282.98
  5. Step 5: Solve for x
    x = 129,137,282.98/13,107.56
  6. Step 6: Final answer
    x = 9,852.12

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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.