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Finding the Fourth Proportional to 18,871.30, 26,053.78 and 12,503.29

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Solution

The fourth proportional to 18,871.30, 26,053.78 and 12,503.29 is: 17,262.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.30 : 26,053.78 = 12,503.29 : x
  2. Step 2: Convert to fraction form
    18,871.30/26,053.78 = 12,503.29/x
  3. Step 3: Cross multiply
    18,871.30x = 26,053.78 × 12,503.29
  4. Step 4: Simplify right side
    18,871.30x = 325,757,966.94
  5. Step 5: Solve for x
    x = 325,757,966.94/18,871.30
  6. Step 6: Final answer
    x = 17,262.08

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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.