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Finding the Fourth Proportional to 10,920.39, 15,054.87 and 9,235.02

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Solution

The fourth proportional to 10,920.39, 15,054.87 and 9,235.02 is: 12,731.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.39 : 15,054.87 = 9,235.02 : x
  2. Step 2: Convert to fraction form
    10,920.39/15,054.87 = 9,235.02/x
  3. Step 3: Cross multiply
    10,920.39x = 15,054.87 × 9,235.02
  4. Step 4: Simplify right side
    10,920.39x = 139,032,025.55
  5. Step 5: Solve for x
    x = 139,032,025.55/10,920.39
  6. Step 6: Final answer
    x = 12,731.42

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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.