Home / 39,128.60-58,731.30-19,429.40

Finding the Fourth Proportional to 39,128.60, 58,731.30 and 19,429.40

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Solution

The fourth proportional to 39,128.60, 58,731.30 and 19,429.40 is: 29,163.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,128.60 : 58,731.30 = 19,429.40 : x
  2. Step 2: Convert to fraction form
    39,128.60/58,731.30 = 19,429.40/x
  3. Step 3: Cross multiply
    39,128.60x = 58,731.30 × 19,429.40
  4. Step 4: Simplify right side
    39,128.60x = 1,141,113,920.22
  5. Step 5: Solve for x
    x = 1,141,113,920.22/39,128.60
  6. Step 6: Final answer
    x = 29,163.17

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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.