Home / 30,741.93-42,427.80-21,294.09

Finding the Fourth Proportional to 30,741.93, 42,427.80 and 21,294.09

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Solution

The fourth proportional to 30,741.93, 42,427.80 and 21,294.09 is: 29,388.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,741.93 : 42,427.80 = 21,294.09 : x
  2. Step 2: Convert to fraction form
    30,741.93/42,427.80 = 21,294.09/x
  3. Step 3: Cross multiply
    30,741.93x = 42,427.80 × 21,294.09
  4. Step 4: Simplify right side
    30,741.93x = 903,461,391.70
  5. Step 5: Solve for x
    x = 903,461,391.70/30,741.93
  6. Step 6: Final answer
    x = 29,388.57

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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.