Home / 21,430.64-29,573.62-11,870.15

Finding the Fourth Proportional to 21,430.64, 29,573.62 and 11,870.15

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Solution

The fourth proportional to 21,430.64, 29,573.62 and 11,870.15 is: 16,380.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,430.64 : 29,573.62 = 11,870.15 : x
  2. Step 2: Convert to fraction form
    21,430.64/29,573.62 = 11,870.15/x
  3. Step 3: Cross multiply
    21,430.64x = 29,573.62 × 11,870.15
  4. Step 4: Simplify right side
    21,430.64x = 351,043,127.90
  5. Step 5: Solve for x
    x = 351,043,127.90/21,430.64
  6. Step 6: Final answer
    x = 16,380.43

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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.