Home / 13,458.60-18,567.72-8,420.76

Finding the Fourth Proportional to 13,458.60, 18,567.72 and 8,420.76

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Solution

The fourth proportional to 13,458.60, 18,567.72 and 8,420.76 is: 11,617.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.60 : 18,567.72 = 8,420.76 : x
  2. Step 2: Convert to fraction form
    13,458.60/18,567.72 = 8,420.76/x
  3. Step 3: Cross multiply
    13,458.60x = 18,567.72 × 8,420.76
  4. Step 4: Simplify right side
    13,458.60x = 156,354,313.87
  5. Step 5: Solve for x
    x = 156,354,313.87/13,458.60
  6. Step 6: Final answer
    x = 11,617.43

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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.