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Finding the Fourth Proportional to 21,703.67, 29,953.29 and 13,206.41

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Solution

The fourth proportional to 21,703.67, 29,953.29 and 13,206.41 is: 18,226.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,703.67 : 29,953.29 = 13,206.41 : x
  2. Step 2: Convert to fraction form
    21,703.67/29,953.29 = 13,206.41/x
  3. Step 3: Cross multiply
    21,703.67x = 29,953.29 × 13,206.41
  4. Step 4: Simplify right side
    21,703.67x = 395,575,278.82
  5. Step 5: Solve for x
    x = 395,575,278.82/21,703.67
  6. Step 6: Final answer
    x = 18,226.20

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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.