Home / 20,509.96-28,289.60-15,742.30

Finding the Fourth Proportional to 20,509.96, 28,289.60 and 15,742.30

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Solution

The fourth proportional to 20,509.96, 28,289.60 and 15,742.30 is: 21,713.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.96 : 28,289.60 = 15,742.30 : x
  2. Step 2: Convert to fraction form
    20,509.96/28,289.60 = 15,742.30/x
  3. Step 3: Cross multiply
    20,509.96x = 28,289.60 × 15,742.30
  4. Step 4: Simplify right side
    20,509.96x = 445,343,220.64
  5. Step 5: Solve for x
    x = 445,343,220.64/20,509.96
  6. Step 6: Final answer
    x = 21,713.51

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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.