Home / 12,008.82-18,013.10-5,430.45

Finding the Fourth Proportional to 12,008.82, 18,013.10 and 5,430.45

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Solution

The fourth proportional to 12,008.82, 18,013.10 and 5,430.45 is: 8,145.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,008.82 : 18,013.10 = 5,430.45 : x
  2. Step 2: Convert to fraction form
    12,008.82/18,013.10 = 5,430.45/x
  3. Step 3: Cross multiply
    12,008.82x = 18,013.10 × 5,430.45
  4. Step 4: Simplify right side
    12,008.82x = 97,819,211.74
  5. Step 5: Solve for x
    x = 97,819,211.74/12,008.82
  6. Step 6: Final answer
    x = 8,145.61

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1.5x scale

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.