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Finding the Fourth Proportional to 21,014.96, 28,992.48 and 12,059.20

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Solution

The fourth proportional to 21,014.96, 28,992.48 and 12,059.20 is: 16,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.96 : 28,992.48 = 12,059.20 : x
  2. Step 2: Convert to fraction form
    21,014.96/28,992.48 = 12,059.20/x
  3. Step 3: Cross multiply
    21,014.96x = 28,992.48 × 12,059.20
  4. Step 4: Simplify right side
    21,014.96x = 349,626,114.82
  5. Step 5: Solve for x
    x = 349,626,114.82/21,014.96
  6. Step 6: Final answer
    x = 16,637.01

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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.