Home / 13,518.13-18,667.86-12,781.84

Finding the Fourth Proportional to 13,518.13, 18,667.86 and 12,781.84

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Solution

The fourth proportional to 13,518.13, 18,667.86 and 12,781.84 is: 17,651.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.13 : 18,667.86 = 12,781.84 : x
  2. Step 2: Convert to fraction form
    13,518.13/18,667.86 = 12,781.84/x
  3. Step 3: Cross multiply
    13,518.13x = 18,667.86 × 12,781.84
  4. Step 4: Simplify right side
    13,518.13x = 238,609,535.75
  5. Step 5: Solve for x
    x = 238,609,535.75/13,518.13
  6. Step 6: Final answer
    x = 17,651.08

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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.