Home / 30,972.30-42,754.86-20,914.37

Finding the Fourth Proportional to 30,972.30, 42,754.86 and 20,914.37

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Solution

The fourth proportional to 30,972.30, 42,754.86 and 20,914.37 is: 28,870.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.30 : 42,754.86 = 20,914.37 : x
  2. Step 2: Convert to fraction form
    30,972.30/42,754.86 = 20,914.37/x
  3. Step 3: Cross multiply
    30,972.30x = 42,754.86 × 20,914.37
  4. Step 4: Simplify right side
    30,972.30x = 894,190,961.34
  5. Step 5: Solve for x
    x = 894,190,961.34/30,972.30
  6. Step 6: Final answer
    x = 28,870.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.