Home / 21,433.12-29,575-11,999.36

Finding the Fourth Proportional to 21,433.12, 29,575 and 11,999.36

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Solution

The fourth proportional to 21,433.12, 29,575 and 11,999.36 is: 16,557.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,433.12 : 29,575 = 11,999.36 : x
  2. Step 2: Convert to fraction form
    21,433.12/29,575 = 11,999.36/x
  3. Step 3: Cross multiply
    21,433.12x = 29,575 × 11,999.36
  4. Step 4: Simplify right side
    21,433.12x = 354,881,072
  5. Step 5: Solve for x
    x = 354,881,072/21,433.12
  6. Step 6: Final answer
    x = 16,557.60

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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.