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Finding the Fourth Proportional to 13,957.72, 19,258.93 and 8,918.07

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Solution

The fourth proportional to 13,957.72, 19,258.93 and 8,918.07 is: 12,305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,957.72 : 19,258.93 = 8,918.07 : x
  2. Step 2: Convert to fraction form
    13,957.72/19,258.93 = 8,918.07/x
  3. Step 3: Cross multiply
    13,957.72x = 19,258.93 × 8,918.07
  4. Step 4: Simplify right side
    13,957.72x = 171,752,485.87
  5. Step 5: Solve for x
    x = 171,752,485.87/13,957.72
  6. Step 6: Final answer
    x = 12,305.20

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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.