Home / 12,006.40-18,017.70-5,429.20

Finding the Fourth Proportional to 12,006.40, 18,017.70 and 5,429.20

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Solution

The fourth proportional to 12,006.40, 18,017.70 and 5,429.20 is: 8,147.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,006.40 : 18,017.70 = 5,429.20 : x
  2. Step 2: Convert to fraction form
    12,006.40/18,017.70 = 5,429.20/x
  3. Step 3: Cross multiply
    12,006.40x = 18,017.70 × 5,429.20
  4. Step 4: Simplify right side
    12,006.40x = 97,821,696.84
  5. Step 5: Solve for x
    x = 97,821,696.84/12,006.40
  6. Step 6: Final answer
    x = 8,147.46

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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.