Home / 12,905.78-19,358.76-5,114.58

Finding the Fourth Proportional to 12,905.78, 19,358.76 and 5,114.58

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Solution

The fourth proportional to 12,905.78, 19,358.76 and 5,114.58 is: 7,671.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.78 : 19,358.76 = 5,114.58 : x
  2. Step 2: Convert to fraction form
    12,905.78/19,358.76 = 5,114.58/x
  3. Step 3: Cross multiply
    12,905.78x = 19,358.76 × 5,114.58
  4. Step 4: Simplify right side
    12,905.78x = 99,011,926.72
  5. Step 5: Solve for x
    x = 99,011,926.72/12,905.78
  6. Step 6: Final answer
    x = 7,671.91

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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.