Home / 13,621.51-20,430.74-3,762.19

Finding the Fourth Proportional to 13,621.51, 20,430.74 and 3,762.19

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Solution

The fourth proportional to 13,621.51, 20,430.74 and 3,762.19 is: 5,642.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.51 : 20,430.74 = 3,762.19 : x
  2. Step 2: Convert to fraction form
    13,621.51/20,430.74 = 3,762.19/x
  3. Step 3: Cross multiply
    13,621.51x = 20,430.74 × 3,762.19
  4. Step 4: Simplify right side
    13,621.51x = 76,864,306.91
  5. Step 5: Solve for x
    x = 76,864,306.91/13,621.51
  6. Step 6: Final answer
    x = 5,642.86

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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.