Home / 19,778.60-29,667.90-18,903.80

Finding the Fourth Proportional to 19,778.60, 29,667.90 and 18,903.80

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Solution

The fourth proportional to 19,778.60, 29,667.90 and 18,903.80 is: 28,355.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,778.60 : 29,667.90 = 18,903.80 : x
  2. Step 2: Convert to fraction form
    19,778.60/29,667.90 = 18,903.80/x
  3. Step 3: Cross multiply
    19,778.60x = 29,667.90 × 18,903.80
  4. Step 4: Simplify right side
    19,778.60x = 560,836,048.02
  5. Step 5: Solve for x
    x = 560,836,048.02/19,778.60
  6. Step 6: Final answer
    x = 28,355.70

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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.