Home / 13,822.55-19,078.20-8,785.79

Finding the Fourth Proportional to 13,822.55, 19,078.20 and 8,785.79

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Solution

The fourth proportional to 13,822.55, 19,078.20 and 8,785.79 is: 12,126.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,822.55 : 19,078.20 = 8,785.79 : x
  2. Step 2: Convert to fraction form
    13,822.55/19,078.20 = 8,785.79/x
  3. Step 3: Cross multiply
    13,822.55x = 19,078.20 × 8,785.79
  4. Step 4: Simplify right side
    13,822.55x = 167,617,058.78
  5. Step 5: Solve for x
    x = 167,617,058.78/13,822.55
  6. Step 6: Final answer
    x = 12,126.35

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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.