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Finding the Fourth Proportional to 10,611, 14,644.80 and 6,421.68

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Solution

The fourth proportional to 10,611, 14,644.80 and 6,421.68 is: 8,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,611 : 14,644.80 = 6,421.68 : x
  2. Step 2: Convert to fraction form
    10,611/14,644.80 = 6,421.68/x
  3. Step 3: Cross multiply
    10,611x = 14,644.80 × 6,421.68
  4. Step 4: Simplify right side
    10,611x = 94,044,219.26
  5. Step 5: Solve for x
    x = 94,044,219.26/10,611
  6. Step 6: Final answer
    x = 8,862.90

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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.