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Finding the Fourth Proportional to 13,482.17, 18,603.85 and 7,815.73

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Solution

The fourth proportional to 13,482.17, 18,603.85 and 7,815.73 is: 10,784.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,482.17 : 18,603.85 = 7,815.73 : x
  2. Step 2: Convert to fraction form
    13,482.17/18,603.85 = 7,815.73/x
  3. Step 3: Cross multiply
    13,482.17x = 18,603.85 × 7,815.73
  4. Step 4: Simplify right side
    13,482.17x = 145,402,765.60
  5. Step 5: Solve for x
    x = 145,402,765.60/13,482.17
  6. Step 6: Final answer
    x = 10,784.82

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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.