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Finding the Fourth Proportional to 9,891.63, 13,650.35 and 5,415.39

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Solution

The fourth proportional to 9,891.63, 13,650.35 and 5,415.39 is: 7,473.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,891.63 : 13,650.35 = 5,415.39 : x
  2. Step 2: Convert to fraction form
    9,891.63/13,650.35 = 5,415.39/x
  3. Step 3: Cross multiply
    9,891.63x = 13,650.35 × 5,415.39
  4. Step 4: Simplify right side
    9,891.63x = 73,921,941.81
  5. Step 5: Solve for x
    x = 73,921,941.81/9,891.63
  6. Step 6: Final answer
    x = 7,473.18

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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.