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Finding the Fourth Proportional to 12,571.55, 18,746.28 and 12,458.96

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Solution

The fourth proportional to 12,571.55, 18,746.28 and 12,458.96 is: 18,578.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,571.55 : 18,746.28 = 12,458.96 : x
  2. Step 2: Convert to fraction form
    12,571.55/18,746.28 = 12,458.96/x
  3. Step 3: Cross multiply
    12,571.55x = 18,746.28 × 12,458.96
  4. Step 4: Simplify right side
    12,571.55x = 233,559,090.37
  5. Step 5: Solve for x
    x = 233,559,090.37/12,571.55
  6. Step 6: Final answer
    x = 18,578.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.