Home / 13,135.60-19,703.40-8,220.40

Finding the Fourth Proportional to 13,135.60, 19,703.40 and 8,220.40

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Solution

The fourth proportional to 13,135.60, 19,703.40 and 8,220.40 is: 12,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.60 : 19,703.40 = 8,220.40 : x
  2. Step 2: Convert to fraction form
    13,135.60/19,703.40 = 8,220.40/x
  3. Step 3: Cross multiply
    13,135.60x = 19,703.40 × 8,220.40
  4. Step 4: Simplify right side
    13,135.60x = 161,969,829.36
  5. Step 5: Solve for x
    x = 161,969,829.36/13,135.60
  6. Step 6: Final answer
    x = 12,330.60

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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.