Home / 12,945.83-17,865.07-7,280.57

Finding the Fourth Proportional to 12,945.83, 17,865.07 and 7,280.57

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Solution

The fourth proportional to 12,945.83, 17,865.07 and 7,280.57 is: 10,047.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.83 : 17,865.07 = 7,280.57 : x
  2. Step 2: Convert to fraction form
    12,945.83/17,865.07 = 7,280.57/x
  3. Step 3: Cross multiply
    12,945.83x = 17,865.07 × 7,280.57
  4. Step 4: Simplify right side
    12,945.83x = 130,067,964.99
  5. Step 5: Solve for x
    x = 130,067,964.99/12,945.83
  6. Step 6: Final answer
    x = 10,047.10

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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.