Home / 28,290.21-42,370.66-13,509.48

Finding the Fourth Proportional to 28,290.21, 42,370.66 and 13,509.48

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Solution

The fourth proportional to 28,290.21, 42,370.66 and 13,509.48 is: 20,233.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.21 : 42,370.66 = 13,509.48 : x
  2. Step 2: Convert to fraction form
    28,290.21/42,370.66 = 13,509.48/x
  3. Step 3: Cross multiply
    28,290.21x = 42,370.66 × 13,509.48
  4. Step 4: Simplify right side
    28,290.21x = 572,405,583.86
  5. Step 5: Solve for x
    x = 572,405,583.86/28,290.21
  6. Step 6: Final answer
    x = 20,233.35

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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.