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Finding the Fourth Proportional to 15,211.90, 22,813.80 and 4,681.90

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Solution

The fourth proportional to 15,211.90, 22,813.80 and 4,681.90 is: 7,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.90 : 22,813.80 = 4,681.90 : x
  2. Step 2: Convert to fraction form
    15,211.90/22,813.80 = 4,681.90/x
  3. Step 3: Cross multiply
    15,211.90x = 22,813.80 × 4,681.90
  4. Step 4: Simplify right side
    15,211.90x = 106,811,930.22
  5. Step 5: Solve for x
    x = 106,811,930.22/15,211.90
  6. Step 6: Final answer
    x = 7,021.60

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1.5x scale

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.