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Finding the Fourth Proportional to 21,019.86, 29,009.16 and 12,069.11

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Solution

The fourth proportional to 21,019.86, 29,009.16 and 12,069.11 is: 16,656.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.86 : 29,009.16 = 12,069.11 : x
  2. Step 2: Convert to fraction form
    21,019.86/29,009.16 = 12,069.11/x
  3. Step 3: Cross multiply
    21,019.86x = 29,009.16 × 12,069.11
  4. Step 4: Simplify right side
    21,019.86x = 350,114,668.55
  5. Step 5: Solve for x
    x = 350,114,668.55/21,019.86
  6. Step 6: Final answer
    x = 16,656.37

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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.