Home / 7,919.78-10,931.30-4,934.01

Finding the Fourth Proportional to 7,919.78, 10,931.30 and 4,934.01

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Solution

The fourth proportional to 7,919.78, 10,931.30 and 4,934.01 is: 6,810.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,919.78 : 10,931.30 = 4,934.01 : x
  2. Step 2: Convert to fraction form
    7,919.78/10,931.30 = 4,934.01/x
  3. Step 3: Cross multiply
    7,919.78x = 10,931.30 × 4,934.01
  4. Step 4: Simplify right side
    7,919.78x = 53,935,206.09
  5. Step 5: Solve for x
    x = 53,935,206.09/7,919.78
  6. Step 6: Final answer
    x = 6,810.19

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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.