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Finding the Fourth Proportional to 21,764.99, 30,024.63 and 14,215.74

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Solution

The fourth proportional to 21,764.99, 30,024.63 and 14,215.74 is: 19,610.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,764.99 : 30,024.63 = 14,215.74 : x
  2. Step 2: Convert to fraction form
    21,764.99/30,024.63 = 14,215.74/x
  3. Step 3: Cross multiply
    21,764.99x = 30,024.63 × 14,215.74
  4. Step 4: Simplify right side
    21,764.99x = 426,822,112.47
  5. Step 5: Solve for x
    x = 426,822,112.47/21,764.99
  6. Step 6: Final answer
    x = 19,610.49

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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.