Home / 21,266.15-31,875.73-8,779.29

Finding the Fourth Proportional to 21,266.15, 31,875.73 and 8,779.29

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Solution

The fourth proportional to 21,266.15, 31,875.73 and 8,779.29 is: 13,159.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.15 : 31,875.73 = 8,779.29 : x
  2. Step 2: Convert to fraction form
    21,266.15/31,875.73 = 8,779.29/x
  3. Step 3: Cross multiply
    21,266.15x = 31,875.73 × 8,779.29
  4. Step 4: Simplify right side
    21,266.15x = 279,846,136.15
  5. Step 5: Solve for x
    x = 279,846,136.15/21,266.15
  6. Step 6: Final answer
    x = 13,159.23

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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.