Home / 21,312.04-29,409.30-11,881

Finding the Fourth Proportional to 21,312.04, 29,409.30 and 11,881

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Solution

The fourth proportional to 21,312.04, 29,409.30 and 11,881 is: 16,395.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.04 : 29,409.30 = 11,881 : x
  2. Step 2: Convert to fraction form
    21,312.04/29,409.30 = 11,881/x
  3. Step 3: Cross multiply
    21,312.04x = 29,409.30 × 11,881
  4. Step 4: Simplify right side
    21,312.04x = 349,411,893.30
  5. Step 5: Solve for x
    x = 349,411,893.30/21,312.04
  6. Step 6: Final answer
    x = 16,395.05

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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.