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Finding the Fourth Proportional to 21,368.94, 29,489.15 and 11,937.50

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Solution

The fourth proportional to 21,368.94, 29,489.15 and 11,937.50 is: 16,473.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,368.94 : 29,489.15 = 11,937.50 : x
  2. Step 2: Convert to fraction form
    21,368.94/29,489.15 = 11,937.50/x
  3. Step 3: Cross multiply
    21,368.94x = 29,489.15 × 11,937.50
  4. Step 4: Simplify right side
    21,368.94x = 352,026,668.44
  5. Step 5: Solve for x
    x = 352,026,668.44/21,368.94
  6. Step 6: Final answer
    x = 16,473.75

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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.