Home / 30,741.75-42,372.60-21,777.75

Finding the Fourth Proportional to 30,741.75, 42,372.60 and 21,777.75

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Solution

The fourth proportional to 30,741.75, 42,372.60 and 21,777.75 is: 30,017.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,741.75 : 42,372.60 = 21,777.75 : x
  2. Step 2: Convert to fraction form
    30,741.75/42,372.60 = 21,777.75/x
  3. Step 3: Cross multiply
    30,741.75x = 42,372.60 × 21,777.75
  4. Step 4: Simplify right side
    30,741.75x = 922,779,889.65
  5. Step 5: Solve for x
    x = 922,779,889.65/30,741.75
  6. Step 6: Final answer
    x = 30,017.16

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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.