Home / 20,873.40-31,302.30-8,389.20

Finding the Fourth Proportional to 20,873.40, 31,302.30 and 8,389.20

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Solution

The fourth proportional to 20,873.40, 31,302.30 and 8,389.20 is: 12,580.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.40 : 31,302.30 = 8,389.20 : x
  2. Step 2: Convert to fraction form
    20,873.40/31,302.30 = 8,389.20/x
  3. Step 3: Cross multiply
    20,873.40x = 31,302.30 × 8,389.20
  4. Step 4: Simplify right side
    20,873.40x = 262,601,255.16
  5. Step 5: Solve for x
    x = 262,601,255.16/20,873.40
  6. Step 6: Final answer
    x = 12,580.67

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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.