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Finding the Fourth Proportional to 8,986.55, 12,400.85 and 4,953.07

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Solution

The fourth proportional to 8,986.55, 12,400.85 and 4,953.07 is: 6,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.55 : 12,400.85 = 4,953.07 : x
  2. Step 2: Convert to fraction form
    8,986.55/12,400.85 = 4,953.07/x
  3. Step 3: Cross multiply
    8,986.55x = 12,400.85 × 4,953.07
  4. Step 4: Simplify right side
    8,986.55x = 61,422,191.34
  5. Step 5: Solve for x
    x = 61,422,191.34/8,986.55
  6. Step 6: Final answer
    x = 6,834.90

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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.