Home / 20,745.60-31,118.40-6,705.60

Finding the Fourth Proportional to 20,745.60, 31,118.40 and 6,705.60

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Solution

The fourth proportional to 20,745.60, 31,118.40 and 6,705.60 is: 10,058.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.60 : 31,118.40 = 6,705.60 : x
  2. Step 2: Convert to fraction form
    20,745.60/31,118.40 = 6,705.60/x
  3. Step 3: Cross multiply
    20,745.60x = 31,118.40 × 6,705.60
  4. Step 4: Simplify right side
    20,745.60x = 208,667,543.04
  5. Step 5: Solve for x
    x = 208,667,543.04/20,745.60
  6. Step 6: Final answer
    x = 10,058.40

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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.