Home / 11,985.99-17,988.61-5,412.75

Finding the Fourth Proportional to 11,985.99, 17,988.61 and 5,412.75

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Solution

The fourth proportional to 11,985.99, 17,988.61 and 5,412.75 is: 8,123.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,985.99 : 17,988.61 = 5,412.75 : x
  2. Step 2: Convert to fraction form
    11,985.99/17,988.61 = 5,412.75/x
  3. Step 3: Cross multiply
    11,985.99x = 17,988.61 × 5,412.75
  4. Step 4: Simplify right side
    11,985.99x = 97,367,848.78
  5. Step 5: Solve for x
    x = 97,367,848.78/11,985.99
  6. Step 6: Final answer
    x = 8,123.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.