Home / 20,871.04-31,307.04-8,392.32

Finding the Fourth Proportional to 20,871.04, 31,307.04 and 8,392.32

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Solution

The fourth proportional to 20,871.04, 31,307.04 and 8,392.32 is: 12,588.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.04 : 31,307.04 = 8,392.32 : x
  2. Step 2: Convert to fraction form
    20,871.04/31,307.04 = 8,392.32/x
  3. Step 3: Cross multiply
    20,871.04x = 31,307.04 × 8,392.32
  4. Step 4: Simplify right side
    20,871.04x = 262,738,697.93
  5. Step 5: Solve for x
    x = 262,738,697.93/20,871.04
  6. Step 6: Final answer
    x = 12,588.67

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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.