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Finding the Fourth Proportional to 21,065.57, 29,070.65 and 11,634.29

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Solution

The fourth proportional to 21,065.57, 29,070.65 and 11,634.29 is: 16,055.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.57 : 29,070.65 = 11,634.29 : x
  2. Step 2: Convert to fraction form
    21,065.57/29,070.65 = 11,634.29/x
  3. Step 3: Cross multiply
    21,065.57x = 29,070.65 × 11,634.29
  4. Step 4: Simplify right side
    21,065.57x = 338,216,256.32
  5. Step 5: Solve for x
    x = 338,216,256.32/21,065.57
  6. Step 6: Final answer
    x = 16,055.41

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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.