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Finding the Fourth Proportional to 12,579.40, 18,866.40 and 7,303.24

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Solution

The fourth proportional to 12,579.40, 18,866.40 and 7,303.24 is: 10,953.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.40 : 18,866.40 = 7,303.24 : x
  2. Step 2: Convert to fraction form
    12,579.40/18,866.40 = 7,303.24/x
  3. Step 3: Cross multiply
    12,579.40x = 18,866.40 × 7,303.24
  4. Step 4: Simplify right side
    12,579.40x = 137,785,847.14
  5. Step 5: Solve for x
    x = 137,785,847.14/12,579.40
  6. Step 6: Final answer
    x = 10,953.29

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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.