Home / 28,765.89-39,685.23-18,149.31

Finding the Fourth Proportional to 28,765.89, 39,685.23 and 18,149.31

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Solution

The fourth proportional to 28,765.89, 39,685.23 and 18,149.31 is: 25,038.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,765.89 : 39,685.23 = 18,149.31 : x
  2. Step 2: Convert to fraction form
    28,765.89/39,685.23 = 18,149.31/x
  3. Step 3: Cross multiply
    28,765.89x = 39,685.23 × 18,149.31
  4. Step 4: Simplify right side
    28,765.89x = 720,259,541.69
  5. Step 5: Solve for x
    x = 720,259,541.69/28,765.89
  6. Step 6: Final answer
    x = 25,038.67

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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.