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Finding the Fourth Proportional to 21,391.86, 32,090.96 and 7,355.51

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Solution

The fourth proportional to 21,391.86, 32,090.96 and 7,355.51 is: 11,034.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.86 : 32,090.96 = 7,355.51 : x
  2. Step 2: Convert to fraction form
    21,391.86/32,090.96 = 7,355.51/x
  3. Step 3: Cross multiply
    21,391.86x = 32,090.96 × 7,355.51
  4. Step 4: Simplify right side
    21,391.86x = 236,045,235.12
  5. Step 5: Solve for x
    x = 236,045,235.12/21,391.86
  6. Step 6: Final answer
    x = 11,034.35

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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.