Home / 15,852.54-21,877.38-8,778.81

Finding the Fourth Proportional to 15,852.54, 21,877.38 and 8,778.81

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Solution

The fourth proportional to 15,852.54, 21,877.38 and 8,778.81 is: 12,115.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,852.54 : 21,877.38 = 8,778.81 : x
  2. Step 2: Convert to fraction form
    15,852.54/21,877.38 = 8,778.81/x
  3. Step 3: Cross multiply
    15,852.54x = 21,877.38 × 8,778.81
  4. Step 4: Simplify right side
    15,852.54x = 192,057,362.32
  5. Step 5: Solve for x
    x = 192,057,362.32/15,852.54
  6. Step 6: Final answer
    x = 12,115.24

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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.