Home / 20,230.85-27,928.86-12,681.65

Finding the Fourth Proportional to 20,230.85, 27,928.86 and 12,681.65

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Solution

The fourth proportional to 20,230.85, 27,928.86 and 12,681.65 is: 17,507.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,230.85 : 27,928.86 = 12,681.65 : x
  2. Step 2: Convert to fraction form
    20,230.85/27,928.86 = 12,681.65/x
  3. Step 3: Cross multiply
    20,230.85x = 27,928.86 × 12,681.65
  4. Step 4: Simplify right side
    20,230.85x = 354,184,027.42
  5. Step 5: Solve for x
    x = 354,184,027.42/20,230.85
  6. Step 6: Final answer
    x = 17,507.13

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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.