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Finding the Fourth Proportional to 21,890.75, 32,840.93 and 7,101.16

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Solution

The fourth proportional to 21,890.75, 32,840.93 and 7,101.16 is: 10,653.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.75 : 32,840.93 = 7,101.16 : x
  2. Step 2: Convert to fraction form
    21,890.75/32,840.93 = 7,101.16/x
  3. Step 3: Cross multiply
    21,890.75x = 32,840.93 × 7,101.16
  4. Step 4: Simplify right side
    21,890.75x = 233,208,698.48
  5. Step 5: Solve for x
    x = 233,208,698.48/21,890.75
  6. Step 6: Final answer
    x = 10,653.30

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1.5x scale

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.