Home / 47,087.45-70,630.21-13,806.78

Finding the Fourth Proportional to 47,087.45, 70,630.21 and 13,806.78

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Solution

The fourth proportional to 47,087.45, 70,630.21 and 13,806.78 is: 20,709.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,087.45 : 70,630.21 = 13,806.78 : x
  2. Step 2: Convert to fraction form
    47,087.45/70,630.21 = 13,806.78/x
  3. Step 3: Cross multiply
    47,087.45x = 70,630.21 × 13,806.78
  4. Step 4: Simplify right side
    47,087.45x = 975,175,770.82
  5. Step 5: Solve for x
    x = 975,175,770.82/47,087.45
  6. Step 6: Final answer
    x = 20,709.89

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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.