Home / 20,719.40-31,079.10-5,929.20

Finding the Fourth Proportional to 20,719.40, 31,079.10 and 5,929.20

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Solution

The fourth proportional to 20,719.40, 31,079.10 and 5,929.20 is: 8,893.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.40 : 31,079.10 = 5,929.20 : x
  2. Step 2: Convert to fraction form
    20,719.40/31,079.10 = 5,929.20/x
  3. Step 3: Cross multiply
    20,719.40x = 31,079.10 × 5,929.20
  4. Step 4: Simplify right side
    20,719.40x = 184,274,199.72
  5. Step 5: Solve for x
    x = 184,274,199.72/20,719.40
  6. Step 6: Final answer
    x = 8,893.80

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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.