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Finding the Fourth Proportional to 21,354.91, 29,483.63 and 19,112.90

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Solution

The fourth proportional to 21,354.91, 29,483.63 and 19,112.90 is: 26,388.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,354.91 : 29,483.63 = 19,112.90 : x
  2. Step 2: Convert to fraction form
    21,354.91/29,483.63 = 19,112.90/x
  3. Step 3: Cross multiply
    21,354.91x = 29,483.63 × 19,112.90
  4. Step 4: Simplify right side
    21,354.91x = 563,517,500.52
  5. Step 5: Solve for x
    x = 563,517,500.52/21,354.91
  6. Step 6: Final answer
    x = 26,388.20

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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.