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Finding the Fourth Proportional to 18,780.01, 25,916.72 and 10,281.99

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Solution

The fourth proportional to 18,780.01, 25,916.72 and 10,281.99 is: 14,189.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.01 : 25,916.72 = 10,281.99 : x
  2. Step 2: Convert to fraction form
    18,780.01/25,916.72 = 10,281.99/x
  3. Step 3: Cross multiply
    18,780.01x = 25,916.72 × 10,281.99
  4. Step 4: Simplify right side
    18,780.01x = 266,475,455.87
  5. Step 5: Solve for x
    x = 266,475,455.87/18,780.01
  6. Step 6: Final answer
    x = 14,189.31

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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.