Home / 21,962.11-30,307.35-11,890.47

Finding the Fourth Proportional to 21,962.11, 30,307.35 and 11,890.47

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Solution

The fourth proportional to 21,962.11, 30,307.35 and 11,890.47 is: 16,408.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,962.11 : 30,307.35 = 11,890.47 : x
  2. Step 2: Convert to fraction form
    21,962.11/30,307.35 = 11,890.47/x
  3. Step 3: Cross multiply
    21,962.11x = 30,307.35 × 11,890.47
  4. Step 4: Simplify right side
    21,962.11x = 360,368,635.95
  5. Step 5: Solve for x
    x = 360,368,635.95/21,962.11
  6. Step 6: Final answer
    x = 16,408.65

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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.