Home / 12,538.37-18,808.47-4,218.35

Finding the Fourth Proportional to 12,538.37, 18,808.47 and 4,218.35

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Solution

The fourth proportional to 12,538.37, 18,808.47 and 4,218.35 is: 6,327.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,538.37 : 18,808.47 = 4,218.35 : x
  2. Step 2: Convert to fraction form
    12,538.37/18,808.47 = 4,218.35/x
  3. Step 3: Cross multiply
    12,538.37x = 18,808.47 × 4,218.35
  4. Step 4: Simplify right side
    12,538.37x = 79,340,615.38
  5. Step 5: Solve for x
    x = 79,340,615.38/12,538.37
  6. Step 6: Final answer
    x = 6,327.82

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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.