Home / 12,905.81-19,358.72-3,671.81

Finding the Fourth Proportional to 12,905.81, 19,358.72 and 3,671.81

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Solution

The fourth proportional to 12,905.81, 19,358.72 and 3,671.81 is: 5,507.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.81 : 19,358.72 = 3,671.81 : x
  2. Step 2: Convert to fraction form
    12,905.81/19,358.72 = 3,671.81/x
  3. Step 3: Cross multiply
    12,905.81x = 19,358.72 × 3,671.81
  4. Step 4: Simplify right side
    12,905.81x = 71,081,599.26
  5. Step 5: Solve for x
    x = 71,081,599.26/12,905.81
  6. Step 6: Final answer
    x = 5,507.72

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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.