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Finding the Fourth Proportional to 18,420.59, 25,420.41 and 10,037.09

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Solution

The fourth proportional to 18,420.59, 25,420.41 and 10,037.09 is: 13,851.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.59 : 25,420.41 = 10,037.09 : x
  2. Step 2: Convert to fraction form
    18,420.59/25,420.41 = 10,037.09/x
  3. Step 3: Cross multiply
    18,420.59x = 25,420.41 × 10,037.09
  4. Step 4: Simplify right side
    18,420.59x = 255,146,815.90
  5. Step 5: Solve for x
    x = 255,146,815.90/18,420.59
  6. Step 6: Final answer
    x = 13,851.18

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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.