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Finding the Fourth Proportional to 18,780.98, 25,916.95 and 10,282.95

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Solution

The fourth proportional to 18,780.98, 25,916.95 and 10,282.95 is: 14,190.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.98 : 25,916.95 = 10,282.95 : x
  2. Step 2: Convert to fraction form
    18,780.98/25,916.95 = 10,282.95/x
  3. Step 3: Cross multiply
    18,780.98x = 25,916.95 × 10,282.95
  4. Step 4: Simplify right side
    18,780.98x = 266,502,558.56
  5. Step 5: Solve for x
    x = 266,502,558.56/18,780.98
  6. Step 6: Final answer
    x = 14,190.03

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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.