Home / 21,146.04-31,720.08-11,779.02

Finding the Fourth Proportional to 21,146.04, 31,720.08 and 11,779.02

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Solution

The fourth proportional to 21,146.04, 31,720.08 and 11,779.02 is: 17,669.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.04 : 31,720.08 = 11,779.02 : x
  2. Step 2: Convert to fraction form
    21,146.04/31,720.08 = 11,779.02/x
  3. Step 3: Cross multiply
    21,146.04x = 31,720.08 × 11,779.02
  4. Step 4: Simplify right side
    21,146.04x = 373,631,456.72
  5. Step 5: Solve for x
    x = 373,631,456.72/21,146.04
  6. Step 6: Final answer
    x = 17,669.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.