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Finding the Fourth Proportional to 13,496.84, 18,615.12 and 8,782.64

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Solution

The fourth proportional to 13,496.84, 18,615.12 and 8,782.64 is: 12,113.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,496.84 : 18,615.12 = 8,782.64 : x
  2. Step 2: Convert to fraction form
    13,496.84/18,615.12 = 8,782.64/x
  3. Step 3: Cross multiply
    13,496.84x = 18,615.12 × 8,782.64
  4. Step 4: Simplify right side
    13,496.84x = 163,489,897.52
  5. Step 5: Solve for x
    x = 163,489,897.52/13,496.84
  6. Step 6: Final answer
    x = 12,113.20

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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.