Home / 21,490.08-29,647.84-12,409.44

Finding the Fourth Proportional to 21,490.08, 29,647.84 and 12,409.44

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Solution

The fourth proportional to 21,490.08, 29,647.84 and 12,409.44 is: 17,120.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,490.08 : 29,647.84 = 12,409.44 : x
  2. Step 2: Convert to fraction form
    21,490.08/29,647.84 = 12,409.44/x
  3. Step 3: Cross multiply
    21,490.08x = 29,647.84 × 12,409.44
  4. Step 4: Simplify right side
    21,490.08x = 367,913,091.61
  5. Step 5: Solve for x
    x = 367,913,091.61/21,490.08
  6. Step 6: Final answer
    x = 17,120.14

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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.