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Finding the Fourth Proportional to 13,479.45, 18,599.42 and 7,509.77

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Solution

The fourth proportional to 13,479.45, 18,599.42 and 7,509.77 is: 10,362.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.45 : 18,599.42 = 7,509.77 : x
  2. Step 2: Convert to fraction form
    13,479.45/18,599.42 = 7,509.77/x
  3. Step 3: Cross multiply
    13,479.45x = 18,599.42 × 7,509.77
  4. Step 4: Simplify right side
    13,479.45x = 139,677,366.33
  5. Step 5: Solve for x
    x = 139,677,366.33/13,479.45
  6. Step 6: Final answer
    x = 10,362.25

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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.