Home / 28,775.78-39,716.69-19,338.87

Finding the Fourth Proportional to 28,775.78, 39,716.69 and 19,338.87

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Solution

The fourth proportional to 28,775.78, 39,716.69 and 19,338.87 is: 26,691.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.78 : 39,716.69 = 19,338.87 : x
  2. Step 2: Convert to fraction form
    28,775.78/39,716.69 = 19,338.87/x
  3. Step 3: Cross multiply
    28,775.78x = 39,716.69 × 19,338.87
  4. Step 4: Simplify right side
    28,775.78x = 768,075,904.74
  5. Step 5: Solve for x
    x = 768,075,904.74/28,775.78
  6. Step 6: Final answer
    x = 26,691.75

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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.