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Finding the Fourth Proportional to 21,599.77, 29,807.98 and 12,039.39

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Solution

The fourth proportional to 21,599.77, 29,807.98 and 12,039.39 is: 16,614.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,599.77 : 29,807.98 = 12,039.39 : x
  2. Step 2: Convert to fraction form
    21,599.77/29,807.98 = 12,039.39/x
  3. Step 3: Cross multiply
    21,599.77x = 29,807.98 × 12,039.39
  4. Step 4: Simplify right side
    21,599.77x = 358,869,896.33
  5. Step 5: Solve for x
    x = 358,869,896.33/21,599.77
  6. Step 6: Final answer
    x = 16,614.52

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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.