Home / 28,190.70-38,903.58-15,615.54

Finding the Fourth Proportional to 28,190.70, 38,903.58 and 15,615.54

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Solution

The fourth proportional to 28,190.70, 38,903.58 and 15,615.54 is: 21,549.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.70 : 38,903.58 = 15,615.54 : x
  2. Step 2: Convert to fraction form
    28,190.70/38,903.58 = 15,615.54/x
  3. Step 3: Cross multiply
    28,190.70x = 38,903.58 × 15,615.54
  4. Step 4: Simplify right side
    28,190.70x = 607,500,409.63
  5. Step 5: Solve for x
    x = 607,500,409.63/28,190.70
  6. Step 6: Final answer
    x = 21,549.67

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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.