Home / 13,421.46-18,515.19-9,444.78

Finding the Fourth Proportional to 13,421.46, 18,515.19 and 9,444.78

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Solution

The fourth proportional to 13,421.46, 18,515.19 and 9,444.78 is: 13,029.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.46 : 18,515.19 = 9,444.78 : x
  2. Step 2: Convert to fraction form
    13,421.46/18,515.19 = 9,444.78/x
  3. Step 3: Cross multiply
    13,421.46x = 18,515.19 × 9,444.78
  4. Step 4: Simplify right side
    13,421.46x = 174,871,896.21
  5. Step 5: Solve for x
    x = 174,871,896.21/13,421.46
  6. Step 6: Final answer
    x = 13,029.28

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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.