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Finding the Fourth Proportional to 12,953.79, 17,903.84 and 11,418.03

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Solution

The fourth proportional to 12,953.79, 17,903.84 and 11,418.03 is: 15,781.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,953.79 : 17,903.84 = 11,418.03 : x
  2. Step 2: Convert to fraction form
    12,953.79/17,903.84 = 11,418.03/x
  3. Step 3: Cross multiply
    12,953.79x = 17,903.84 × 11,418.03
  4. Step 4: Simplify right side
    12,953.79x = 204,426,525.15
  5. Step 5: Solve for x
    x = 204,426,525.15/12,953.79
  6. Step 6: Final answer
    x = 15,781.21

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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.