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Finding the Fourth Proportional to 21,666.48, 29,899.44 and 12,238.08

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Solution

The fourth proportional to 21,666.48, 29,899.44 and 12,238.08 is: 16,888.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.48 : 29,899.44 = 12,238.08 : x
  2. Step 2: Convert to fraction form
    21,666.48/29,899.44 = 12,238.08/x
  3. Step 3: Cross multiply
    21,666.48x = 29,899.44 × 12,238.08
  4. Step 4: Simplify right side
    21,666.48x = 365,911,738.68
  5. Step 5: Solve for x
    x = 365,911,738.68/21,666.48
  6. Step 6: Final answer
    x = 16,888.38

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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.