Home / 5,119.38-7,678.80-1,656.36

Finding the Fourth Proportional to 5,119.38, 7,678.80 and 1,656.36

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Solution

The fourth proportional to 5,119.38, 7,678.80 and 1,656.36 is: 2,484.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.38 : 7,678.80 = 1,656.36 : x
  2. Step 2: Convert to fraction form
    5,119.38/7,678.80 = 1,656.36/x
  3. Step 3: Cross multiply
    5,119.38x = 7,678.80 × 1,656.36
  4. Step 4: Simplify right side
    5,119.38x = 12,718,857.17
  5. Step 5: Solve for x
    x = 12,718,857.17/5,119.38
  6. Step 6: Final answer
    x = 2,484.45

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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.