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Finding the Fourth Proportional to 18,554.40, 25,605 and 10,056.78

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Solution

The fourth proportional to 18,554.40, 25,605 and 10,056.78 is: 13,878.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,554.40 : 25,605 = 10,056.78 : x
  2. Step 2: Convert to fraction form
    18,554.40/25,605 = 10,056.78/x
  3. Step 3: Cross multiply
    18,554.40x = 25,605 × 10,056.78
  4. Step 4: Simplify right side
    18,554.40x = 257,503,851.90
  5. Step 5: Solve for x
    x = 257,503,851.90/18,554.40
  6. Step 6: Final answer
    x = 13,878.32

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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.