Home / 13,218.95-18,237.42-7,549.61

Finding the Fourth Proportional to 13,218.95, 18,237.42 and 7,549.61

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Solution

The fourth proportional to 13,218.95, 18,237.42 and 7,549.61 is: 10,415.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.95 : 18,237.42 = 7,549.61 : x
  2. Step 2: Convert to fraction form
    13,218.95/18,237.42 = 7,549.61/x
  3. Step 3: Cross multiply
    13,218.95x = 18,237.42 × 7,549.61
  4. Step 4: Simplify right side
    13,218.95x = 137,685,408.41
  5. Step 5: Solve for x
    x = 137,685,408.41/13,218.95
  6. Step 6: Final answer
    x = 10,415.76

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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.