Home / 18,285.79-27,429.75-5,139.18

Finding the Fourth Proportional to 18,285.79, 27,429.75 and 5,139.18

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Solution

The fourth proportional to 18,285.79, 27,429.75 and 5,139.18 is: 7,709.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.79 : 27,429.75 = 5,139.18 : x
  2. Step 2: Convert to fraction form
    18,285.79/27,429.75 = 5,139.18/x
  3. Step 3: Cross multiply
    18,285.79x = 27,429.75 × 5,139.18
  4. Step 4: Simplify right side
    18,285.79x = 140,966,396.91
  5. Step 5: Solve for x
    x = 140,966,396.91/18,285.79
  6. Step 6: Final answer
    x = 7,709.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.