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Finding the Fourth Proportional to 21,507.63, 29,677.50 and 11,946.80

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Solution

The fourth proportional to 21,507.63, 29,677.50 and 11,946.80 is: 16,484.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.63 : 29,677.50 = 11,946.80 : x
  2. Step 2: Convert to fraction form
    21,507.63/29,677.50 = 11,946.80/x
  3. Step 3: Cross multiply
    21,507.63x = 29,677.50 × 11,946.80
  4. Step 4: Simplify right side
    21,507.63x = 354,551,008.61
  5. Step 5: Solve for x
    x = 354,551,008.61/21,507.63
  6. Step 6: Final answer
    x = 16,484.89

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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.