Home / 51,387.69-77,087.46-19,790.40

Finding the Fourth Proportional to 51,387.69, 77,087.46 and 19,790.40

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Solution

The fourth proportional to 51,387.69, 77,087.46 and 19,790.40 is: 29,687.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,387.69 : 77,087.46 = 19,790.40 : x
  2. Step 2: Convert to fraction form
    51,387.69/77,087.46 = 19,790.40/x
  3. Step 3: Cross multiply
    51,387.69x = 77,087.46 × 19,790.40
  4. Step 4: Simplify right side
    51,387.69x = 1,525,591,668.38
  5. Step 5: Solve for x
    x = 1,525,591,668.38/51,387.69
  6. Step 6: Final answer
    x = 29,687.88

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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.