Home / 18,783.12-25,909.44-12,409.92

Finding the Fourth Proportional to 18,783.12, 25,909.44 and 12,409.92

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Solution

The fourth proportional to 18,783.12, 25,909.44 and 12,409.92 is: 17,118.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.12 : 25,909.44 = 12,409.92 : x
  2. Step 2: Convert to fraction form
    18,783.12/25,909.44 = 12,409.92/x
  3. Step 3: Cross multiply
    18,783.12x = 25,909.44 × 12,409.92
  4. Step 4: Simplify right side
    18,783.12x = 321,534,077.64
  5. Step 5: Solve for x
    x = 321,534,077.64/18,783.12
  6. Step 6: Final answer
    x = 17,118.25

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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.