Home / 19,345.54-29,013.64-12,315

Finding the Fourth Proportional to 19,345.54, 29,013.64 and 12,315

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Solution

The fourth proportional to 19,345.54, 29,013.64 and 12,315 is: 18,469.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,345.54 : 29,013.64 = 12,315 : x
  2. Step 2: Convert to fraction form
    19,345.54/29,013.64 = 12,315/x
  3. Step 3: Cross multiply
    19,345.54x = 29,013.64 × 12,315
  4. Step 4: Simplify right side
    19,345.54x = 357,302,976.60
  5. Step 5: Solve for x
    x = 357,302,976.60/19,345.54
  6. Step 6: Final answer
    x = 18,469.53

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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.