Home / 21,219.55-31,830.33-6,988.93

Finding the Fourth Proportional to 21,219.55, 31,830.33 and 6,988.93

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Solution

The fourth proportional to 21,219.55, 31,830.33 and 6,988.93 is: 10,483.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.55 : 31,830.33 = 6,988.93 : x
  2. Step 2: Convert to fraction form
    21,219.55/31,830.33 = 6,988.93/x
  3. Step 3: Cross multiply
    21,219.55x = 31,830.33 × 6,988.93
  4. Step 4: Simplify right side
    21,219.55x = 222,459,948.25
  5. Step 5: Solve for x
    x = 222,459,948.25/21,219.55
  6. Step 6: Final answer
    x = 10,483.73

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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.