Home / 39,405.16-54,379.29-21,500.54

Finding the Fourth Proportional to 39,405.16, 54,379.29 and 21,500.54

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Solution

The fourth proportional to 39,405.16, 54,379.29 and 21,500.54 is: 29,670.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.16 : 54,379.29 = 21,500.54 : x
  2. Step 2: Convert to fraction form
    39,405.16/54,379.29 = 21,500.54/x
  3. Step 3: Cross multiply
    39,405.16x = 54,379.29 × 21,500.54
  4. Step 4: Simplify right side
    39,405.16x = 1,169,184,112.47
  5. Step 5: Solve for x
    x = 1,169,184,112.47/39,405.16
  6. Step 6: Final answer
    x = 29,670.84

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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.