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Finding the Fourth Proportional to 19,356.40, 29,038.70 and 6,218

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Solution

The fourth proportional to 19,356.40, 29,038.70 and 6,218 is: 9,328.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,356.40 : 29,038.70 = 6,218 : x
  2. Step 2: Convert to fraction form
    19,356.40/29,038.70 = 6,218/x
  3. Step 3: Cross multiply
    19,356.40x = 29,038.70 × 6,218
  4. Step 4: Simplify right side
    19,356.40x = 180,562,636.60
  5. Step 5: Solve for x
    x = 180,562,636.60/19,356.40
  6. Step 6: Final answer
    x = 9,328.32

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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.