Home / 30,004.60-45,020.80-13,135.38

Finding the Fourth Proportional to 30,004.60, 45,020.80 and 13,135.38

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Solution

The fourth proportional to 30,004.60, 45,020.80 and 13,135.38 is: 19,709.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,004.60 : 45,020.80 = 13,135.38 : x
  2. Step 2: Convert to fraction form
    30,004.60/45,020.80 = 13,135.38/x
  3. Step 3: Cross multiply
    30,004.60x = 45,020.80 × 13,135.38
  4. Step 4: Simplify right side
    30,004.60x = 591,365,315.90
  5. Step 5: Solve for x
    x = 591,365,315.90/30,004.60
  6. Step 6: Final answer
    x = 19,709.16

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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.