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Finding the Fourth Proportional to 18,810.10, 25,962.60 and 10,857.10

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Solution

The fourth proportional to 18,810.10, 25,962.60 and 10,857.10 is: 14,985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.10 : 25,962.60 = 10,857.10 : x
  2. Step 2: Convert to fraction form
    18,810.10/25,962.60 = 10,857.10/x
  3. Step 3: Cross multiply
    18,810.10x = 25,962.60 × 10,857.10
  4. Step 4: Simplify right side
    18,810.10x = 281,878,544.46
  5. Step 5: Solve for x
    x = 281,878,544.46/18,810.10
  6. Step 6: Final answer
    x = 14,985.49

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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.