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Finding the Fourth Proportional to 21,486.84, 29,652.06 and 11,926.90

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Solution

The fourth proportional to 21,486.84, 29,652.06 and 11,926.90 is: 16,459.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,486.84 : 29,652.06 = 11,926.90 : x
  2. Step 2: Convert to fraction form
    21,486.84/29,652.06 = 11,926.90/x
  3. Step 3: Cross multiply
    21,486.84x = 29,652.06 × 11,926.90
  4. Step 4: Simplify right side
    21,486.84x = 353,657,154.41
  5. Step 5: Solve for x
    x = 353,657,154.41/21,486.84
  6. Step 6: Final answer
    x = 16,459.25

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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.