Home / 13,909.75-19,188.56-12,909.20

Finding the Fourth Proportional to 13,909.75, 19,188.56 and 12,909.20

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Solution

The fourth proportional to 13,909.75, 19,188.56 and 12,909.20 is: 17,808.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.75 : 19,188.56 = 12,909.20 : x
  2. Step 2: Convert to fraction form
    13,909.75/19,188.56 = 12,909.20/x
  3. Step 3: Cross multiply
    13,909.75x = 19,188.56 × 12,909.20
  4. Step 4: Simplify right side
    13,909.75x = 247,708,895.08
  5. Step 5: Solve for x
    x = 247,708,895.08/13,909.75
  6. Step 6: Final answer
    x = 17,808.30

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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.