Home / 13,130.94-18,120.25-7,825.66

Finding the Fourth Proportional to 13,130.94, 18,120.25 and 7,825.66

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Solution

The fourth proportional to 13,130.94, 18,120.25 and 7,825.66 is: 10,799.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.94 : 18,120.25 = 7,825.66 : x
  2. Step 2: Convert to fraction form
    13,130.94/18,120.25 = 7,825.66/x
  3. Step 3: Cross multiply
    13,130.94x = 18,120.25 × 7,825.66
  4. Step 4: Simplify right side
    13,130.94x = 141,803,017.80
  5. Step 5: Solve for x
    x = 141,803,017.80/13,130.94
  6. Step 6: Final answer
    x = 10,799.15

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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.