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Finding the Fourth Proportional to 18,762.03, 28,111.82 and 13,203.72

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Solution

The fourth proportional to 18,762.03, 28,111.82 and 13,203.72 is: 19,783.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.03 : 28,111.82 = 13,203.72 : x
  2. Step 2: Convert to fraction form
    18,762.03/28,111.82 = 13,203.72/x
  3. Step 3: Cross multiply
    18,762.03x = 28,111.82 × 13,203.72
  4. Step 4: Simplify right side
    18,762.03x = 371,180,533.95
  5. Step 5: Solve for x
    x = 371,180,533.95/18,762.03
  6. Step 6: Final answer
    x = 19,783.60

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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.