Home / 20,745.60-31,118.40-5,953.20

Finding the Fourth Proportional to 20,745.60, 31,118.40 and 5,953.20

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Solution

The fourth proportional to 20,745.60, 31,118.40 and 5,953.20 is: 8,929.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,745.60 : 31,118.40 = 5,953.20 : x
  2. Step 2: Convert to fraction form
    20,745.60/31,118.40 = 5,953.20/x
  3. Step 3: Cross multiply
    20,745.60x = 31,118.40 × 5,953.20
  4. Step 4: Simplify right side
    20,745.60x = 185,254,058.88
  5. Step 5: Solve for x
    x = 185,254,058.88/20,745.60
  6. Step 6: Final answer
    x = 8,929.80

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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.