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Finding the Fourth Proportional to 21,065.76, 29,070.40 and 11,634.08

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Solution

The fourth proportional to 21,065.76, 29,070.40 and 11,634.08 is: 16,054.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,065.76 : 29,070.40 = 11,634.08 : x
  2. Step 2: Convert to fraction form
    21,065.76/29,070.40 = 11,634.08/x
  3. Step 3: Cross multiply
    21,065.76x = 29,070.40 × 11,634.08
  4. Step 4: Simplify right side
    21,065.76x = 338,207,359.23
  5. Step 5: Solve for x
    x = 338,207,359.23/21,065.76
  6. Step 6: Final answer
    x = 16,054.84

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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.