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Finding the Fourth Proportional to 21,357.99, 29,474.82 and 11,927.16

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Solution

The fourth proportional to 21,357.99, 29,474.82 and 11,927.16 is: 16,459.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,357.99 : 29,474.82 = 11,927.16 : x
  2. Step 2: Convert to fraction form
    21,357.99/29,474.82 = 11,927.16/x
  3. Step 3: Cross multiply
    21,357.99x = 29,474.82 × 11,927.16
  4. Step 4: Simplify right side
    21,357.99x = 351,550,894.11
  5. Step 5: Solve for x
    x = 351,550,894.11/21,357.99
  6. Step 6: Final answer
    x = 16,459.92

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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.