Home / 30,549.96-42,145.92-21,102.12

Finding the Fourth Proportional to 30,549.96, 42,145.92 and 21,102.12

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Solution

The fourth proportional to 30,549.96, 42,145.92 and 21,102.12 is: 29,111.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,549.96 : 42,145.92 = 21,102.12 : x
  2. Step 2: Convert to fraction form
    30,549.96/42,145.92 = 21,102.12/x
  3. Step 3: Cross multiply
    30,549.96x = 42,145.92 × 21,102.12
  4. Step 4: Simplify right side
    30,549.96x = 889,368,261.35
  5. Step 5: Solve for x
    x = 889,368,261.35/30,549.96
  6. Step 6: Final answer
    x = 29,111.93

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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.