Home / 31,412.12-47,099.72-12,692.75

Finding the Fourth Proportional to 31,412.12, 47,099.72 and 12,692.75

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Solution

The fourth proportional to 31,412.12, 47,099.72 and 12,692.75 is: 19,031.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,412.12 : 47,099.72 = 12,692.75 : x
  2. Step 2: Convert to fraction form
    31,412.12/47,099.72 = 12,692.75/x
  3. Step 3: Cross multiply
    31,412.12x = 47,099.72 × 12,692.75
  4. Step 4: Simplify right side
    31,412.12x = 597,824,971.03
  5. Step 5: Solve for x
    x = 597,824,971.03/31,412.12
  6. Step 6: Final answer
    x = 19,031.67

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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.