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Finding the Fourth Proportional to 21,959.76, 30,303.27 and 13,008.09

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Solution

The fourth proportional to 21,959.76, 30,303.27 and 13,008.09 is: 17,950.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.76 : 30,303.27 = 13,008.09 : x
  2. Step 2: Convert to fraction form
    21,959.76/30,303.27 = 13,008.09/x
  3. Step 3: Cross multiply
    21,959.76x = 30,303.27 × 13,008.09
  4. Step 4: Simplify right side
    21,959.76x = 394,187,663.45
  5. Step 5: Solve for x
    x = 394,187,663.45/21,959.76
  6. Step 6: Final answer
    x = 17,950.45

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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.