Home / 12,909.23-17,769.33-11,312.09

Finding the Fourth Proportional to 12,909.23, 17,769.33 and 11,312.09

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Solution

The fourth proportional to 12,909.23, 17,769.33 and 11,312.09 is: 15,570.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.23 : 17,769.33 = 11,312.09 : x
  2. Step 2: Convert to fraction form
    12,909.23/17,769.33 = 11,312.09/x
  3. Step 3: Cross multiply
    12,909.23x = 17,769.33 × 11,312.09
  4. Step 4: Simplify right side
    12,909.23x = 201,008,171.35
  5. Step 5: Solve for x
    x = 201,008,171.35/12,909.23
  6. Step 6: Final answer
    x = 15,570.89

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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.