Home / 13,139.78-18,135.23-7,834.93

Finding the Fourth Proportional to 13,139.78, 18,135.23 and 7,834.93

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Solution

The fourth proportional to 13,139.78, 18,135.23 and 7,834.93 is: 10,813.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.78 : 18,135.23 = 7,834.93 : x
  2. Step 2: Convert to fraction form
    13,139.78/18,135.23 = 7,834.93/x
  3. Step 3: Cross multiply
    13,139.78x = 18,135.23 × 7,834.93
  4. Step 4: Simplify right side
    13,139.78x = 142,088,173.07
  5. Step 5: Solve for x
    x = 142,088,173.07/13,139.78
  6. Step 6: Final answer
    x = 10,813.59

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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.