Home / 21,477.02-29,638.62-12,977.96

Finding the Fourth Proportional to 21,477.02, 29,638.62 and 12,977.96

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Solution

The fourth proportional to 21,477.02, 29,638.62 and 12,977.96 is: 17,909.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,477.02 : 29,638.62 = 12,977.96 : x
  2. Step 2: Convert to fraction form
    21,477.02/29,638.62 = 12,977.96/x
  3. Step 3: Cross multiply
    21,477.02x = 29,638.62 × 12,977.96
  4. Step 4: Simplify right side
    21,477.02x = 384,648,824.82
  5. Step 5: Solve for x
    x = 384,648,824.82/21,477.02
  6. Step 6: Final answer
    x = 17,909.79

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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.