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Finding the Fourth Proportional to 13,479.88, 18,602.40 and 7,511.68

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Solution

The fourth proportional to 13,479.88, 18,602.40 and 7,511.68 is: 10,366.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.88 : 18,602.40 = 7,511.68 : x
  2. Step 2: Convert to fraction form
    13,479.88/18,602.40 = 7,511.68/x
  3. Step 3: Cross multiply
    13,479.88x = 18,602.40 × 7,511.68
  4. Step 4: Simplify right side
    13,479.88x = 139,735,276.03
  5. Step 5: Solve for x
    x = 139,735,276.03/13,479.88
  6. Step 6: Final answer
    x = 10,366.21

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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.