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Finding the Fourth Proportional to 17,280.86, 25,921.11 and 7,918.22

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Solution

The fourth proportional to 17,280.86, 25,921.11 and 7,918.22 is: 11,877.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,280.86 : 25,921.11 = 7,918.22 : x
  2. Step 2: Convert to fraction form
    17,280.86/25,921.11 = 7,918.22/x
  3. Step 3: Cross multiply
    17,280.86x = 25,921.11 × 7,918.22
  4. Step 4: Simplify right side
    17,280.86x = 205,249,036.77
  5. Step 5: Solve for x
    x = 205,249,036.77/17,280.86
  6. Step 6: Final answer
    x = 11,877.25

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1.5x scale

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.