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Finding the Fourth Proportional to 12,018.70, 18,028.28 and 4,130.28

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Solution

The fourth proportional to 12,018.70, 18,028.28 and 4,130.28 is: 6,195.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.70 : 18,028.28 = 4,130.28 : x
  2. Step 2: Convert to fraction form
    12,018.70/18,028.28 = 4,130.28/x
  3. Step 3: Cross multiply
    12,018.70x = 18,028.28 × 4,130.28
  4. Step 4: Simplify right side
    12,018.70x = 74,461,835.10
  5. Step 5: Solve for x
    x = 74,461,835.10/12,018.70
  6. Step 6: Final answer
    x = 6,195.50

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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.