Home / 13,113.20-19,669.80-8,447.60

Finding the Fourth Proportional to 13,113.20, 19,669.80 and 8,447.60

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Solution

The fourth proportional to 13,113.20, 19,669.80 and 8,447.60 is: 12,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.20 : 19,669.80 = 8,447.60 : x
  2. Step 2: Convert to fraction form
    13,113.20/19,669.80 = 8,447.60/x
  3. Step 3: Cross multiply
    13,113.20x = 19,669.80 × 8,447.60
  4. Step 4: Simplify right side
    13,113.20x = 166,162,602.48
  5. Step 5: Solve for x
    x = 166,162,602.48/13,113.20
  6. Step 6: Final answer
    x = 12,671.40

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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.