Home / 13,143.02-18,137.39-8,427.31

Finding the Fourth Proportional to 13,143.02, 18,137.39 and 8,427.31

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Solution

The fourth proportional to 13,143.02, 18,137.39 and 8,427.31 is: 11,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.02 : 18,137.39 = 8,427.31 : x
  2. Step 2: Convert to fraction form
    13,143.02/18,137.39 = 8,427.31/x
  3. Step 3: Cross multiply
    13,143.02x = 18,137.39 × 8,427.31
  4. Step 4: Simplify right side
    13,143.02x = 152,849,320.64
  5. Step 5: Solve for x
    x = 152,849,320.64/13,143.02
  6. Step 6: Final answer
    x = 11,629.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.