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Finding the Fourth Proportional to 9,903.84, 13,668.12 and 8,130.48

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Solution

The fourth proportional to 9,903.84, 13,668.12 and 8,130.48 is: 11,220.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,903.84 : 13,668.12 = 8,130.48 : x
  2. Step 2: Convert to fraction form
    9,903.84/13,668.12 = 8,130.48/x
  3. Step 3: Cross multiply
    9,903.84x = 13,668.12 × 8,130.48
  4. Step 4: Simplify right side
    9,903.84x = 111,128,376.30
  5. Step 5: Solve for x
    x = 111,128,376.30/9,903.84
  6. Step 6: Final answer
    x = 11,220.74

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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.