Home / 12,881.10-19,321.65-5,485.80

Finding the Fourth Proportional to 12,881.10, 19,321.65 and 5,485.80

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Solution

The fourth proportional to 12,881.10, 19,321.65 and 5,485.80 is: 8,228.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.10 : 19,321.65 = 5,485.80 : x
  2. Step 2: Convert to fraction form
    12,881.10/19,321.65 = 5,485.80/x
  3. Step 3: Cross multiply
    12,881.10x = 19,321.65 × 5,485.80
  4. Step 4: Simplify right side
    12,881.10x = 105,994,707.57
  5. Step 5: Solve for x
    x = 105,994,707.57/12,881.10
  6. Step 6: Final answer
    x = 8,228.70

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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.