Home / 13,261.86-19,889.55-8,905.68

Finding the Fourth Proportional to 13,261.86, 19,889.55 and 8,905.68

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Solution

The fourth proportional to 13,261.86, 19,889.55 and 8,905.68 is: 13,356.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,261.86 : 19,889.55 = 8,905.68 : x
  2. Step 2: Convert to fraction form
    13,261.86/19,889.55 = 8,905.68/x
  3. Step 3: Cross multiply
    13,261.86x = 19,889.55 × 8,905.68
  4. Step 4: Simplify right side
    13,261.86x = 177,129,967.64
  5. Step 5: Solve for x
    x = 177,129,967.64/13,261.86
  6. Step 6: Final answer
    x = 13,356.34

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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.