Home / 21,259.81-31,895.88-8,113.24

Finding the Fourth Proportional to 21,259.81, 31,895.88 and 8,113.24

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Solution

The fourth proportional to 21,259.81, 31,895.88 and 8,113.24 is: 12,172.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.81 : 31,895.88 = 8,113.24 : x
  2. Step 2: Convert to fraction form
    21,259.81/31,895.88 = 8,113.24/x
  3. Step 3: Cross multiply
    21,259.81x = 31,895.88 × 8,113.24
  4. Step 4: Simplify right side
    21,259.81x = 258,778,929.45
  5. Step 5: Solve for x
    x = 258,778,929.45/21,259.81
  6. Step 6: Final answer
    x = 12,172.21

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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.