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Finding the Fourth Proportional to 15,792.93, 21,792.39 and 9,419.87

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Solution

The fourth proportional to 15,792.93, 21,792.39 and 9,419.87 is: 12,998.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,792.93 : 21,792.39 = 9,419.87 : x
  2. Step 2: Convert to fraction form
    15,792.93/21,792.39 = 9,419.87/x
  3. Step 3: Cross multiply
    15,792.93x = 21,792.39 × 9,419.87
  4. Step 4: Simplify right side
    15,792.93x = 205,281,371.83
  5. Step 5: Solve for x
    x = 205,281,371.83/15,792.93
  6. Step 6: Final answer
    x = 12,998.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.