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Finding the Fourth Proportional to 21,657.88, 29,892.81 and 14,090.86

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Solution

The fourth proportional to 21,657.88, 29,892.81 and 14,090.86 is: 19,448.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,657.88 : 29,892.81 = 14,090.86 : x
  2. Step 2: Convert to fraction form
    21,657.88/29,892.81 = 14,090.86/x
  3. Step 3: Cross multiply
    21,657.88x = 29,892.81 × 14,090.86
  4. Step 4: Simplify right side
    21,657.88x = 421,215,400.72
  5. Step 5: Solve for x
    x = 421,215,400.72/21,657.88
  6. Step 6: Final answer
    x = 19,448.60

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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.