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Finding the Fourth Proportional to 21,362.40, 29,479.50 and 11,802.51

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Solution

The fourth proportional to 21,362.40, 29,479.50 and 11,802.51 is: 16,287.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,362.40 : 29,479.50 = 11,802.51 : x
  2. Step 2: Convert to fraction form
    21,362.40/29,479.50 = 11,802.51/x
  3. Step 3: Cross multiply
    21,362.40x = 29,479.50 × 11,802.51
  4. Step 4: Simplify right side
    21,362.40x = 347,932,093.55
  5. Step 5: Solve for x
    x = 347,932,093.55/21,362.40
  6. Step 6: Final answer
    x = 16,287.13

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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.