Home / 21,962.18-30,307.78-11,890.69

Finding the Fourth Proportional to 21,962.18, 30,307.78 and 11,890.69

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Solution

The fourth proportional to 21,962.18, 30,307.78 and 11,890.69 is: 16,409.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,962.18 : 30,307.78 = 11,890.69 : x
  2. Step 2: Convert to fraction form
    21,962.18/30,307.78 = 11,890.69/x
  3. Step 3: Cross multiply
    21,962.18x = 30,307.78 × 11,890.69
  4. Step 4: Simplify right side
    21,962.18x = 360,380,416.57
  5. Step 5: Solve for x
    x = 360,380,416.57/21,962.18
  6. Step 6: Final answer
    x = 16,409.14

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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.