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Finding the Fourth Proportional to 15,701.41, 21,667.74 and 8,986.90

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Solution

The fourth proportional to 15,701.41, 21,667.74 and 8,986.90 is: 12,401.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,701.41 : 21,667.74 = 8,986.90 : x
  2. Step 2: Convert to fraction form
    15,701.41/21,667.74 = 8,986.90/x
  3. Step 3: Cross multiply
    15,701.41x = 21,667.74 × 8,986.90
  4. Step 4: Simplify right side
    15,701.41x = 194,725,812.61
  5. Step 5: Solve for x
    x = 194,725,812.61/15,701.41
  6. Step 6: Final answer
    x = 12,401.80

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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.