Home / 21,339.71-29,447.23-12,385.77

Finding the Fourth Proportional to 21,339.71, 29,447.23 and 12,385.77

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Solution

The fourth proportional to 21,339.71, 29,447.23 and 12,385.77 is: 17,091.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,339.71 : 29,447.23 = 12,385.77 : x
  2. Step 2: Convert to fraction form
    21,339.71/29,447.23 = 12,385.77/x
  3. Step 3: Cross multiply
    21,339.71x = 29,447.23 × 12,385.77
  4. Step 4: Simplify right side
    21,339.71x = 364,726,665.39
  5. Step 5: Solve for x
    x = 364,726,665.39/21,339.71
  6. Step 6: Final answer
    x = 17,091.45

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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.