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Finding the Fourth Proportional to 18,810.48, 28,208.40 and 10,040.60

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Solution

The fourth proportional to 18,810.48, 28,208.40 and 10,040.60 is: 15,056.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.48 : 28,208.40 = 10,040.60 : x
  2. Step 2: Convert to fraction form
    18,810.48/28,208.40 = 10,040.60/x
  3. Step 3: Cross multiply
    18,810.48x = 28,208.40 × 10,040.60
  4. Step 4: Simplify right side
    18,810.48x = 283,229,261.04
  5. Step 5: Solve for x
    x = 283,229,261.04/18,810.48
  6. Step 6: Final answer
    x = 15,056.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.