Home / 19,977.81-29,966.78-5,186.85

Finding the Fourth Proportional to 19,977.81, 29,966.78 and 5,186.85

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Solution

The fourth proportional to 19,977.81, 29,966.78 and 5,186.85 is: 7,780.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,977.81 : 29,966.78 = 5,186.85 : x
  2. Step 2: Convert to fraction form
    19,977.81/29,966.78 = 5,186.85/x
  3. Step 3: Cross multiply
    19,977.81x = 29,966.78 × 5,186.85
  4. Step 4: Simplify right side
    19,977.81x = 155,433,166.91
  5. Step 5: Solve for x
    x = 155,433,166.91/19,977.81
  6. Step 6: Final answer
    x = 7,780.29

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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.