Home / 12,112.64-18,165.45-4,715.45

Finding the Fourth Proportional to 12,112.64, 18,165.45 and 4,715.45

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Solution

The fourth proportional to 12,112.64, 18,165.45 and 4,715.45 is: 7,071.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.64 : 18,165.45 = 4,715.45 : x
  2. Step 2: Convert to fraction form
    12,112.64/18,165.45 = 4,715.45/x
  3. Step 3: Cross multiply
    12,112.64x = 18,165.45 × 4,715.45
  4. Step 4: Simplify right side
    12,112.64x = 85,658,271.20
  5. Step 5: Solve for x
    x = 85,658,271.20/12,112.64
  6. Step 6: Final answer
    x = 7,071.81

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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.