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Finding the Fourth Proportional to 13,483.85, 18,607.77 and 7,821.95

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Solution

The fourth proportional to 13,483.85, 18,607.77 and 7,821.95 is: 10,794.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,483.85 : 18,607.77 = 7,821.95 : x
  2. Step 2: Convert to fraction form
    13,483.85/18,607.77 = 7,821.95/x
  3. Step 3: Cross multiply
    13,483.85x = 18,607.77 × 7,821.95
  4. Step 4: Simplify right side
    13,483.85x = 145,548,953.51
  5. Step 5: Solve for x
    x = 145,548,953.51/13,483.85
  6. Step 6: Final answer
    x = 10,794.32

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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.