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Finding the Fourth Proportional to 15,151.50, 20,911.50 and 8,776.98

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Solution

The fourth proportional to 15,151.50, 20,911.50 and 8,776.98 is: 12,113.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,151.50 : 20,911.50 = 8,776.98 : x
  2. Step 2: Convert to fraction form
    15,151.50/20,911.50 = 8,776.98/x
  3. Step 3: Cross multiply
    15,151.50x = 20,911.50 × 8,776.98
  4. Step 4: Simplify right side
    15,151.50x = 183,539,817.27
  5. Step 5: Solve for x
    x = 183,539,817.27/15,151.50
  6. Step 6: Final answer
    x = 12,113.64

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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.