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Finding the Fourth Proportional to 13,478.15, 18,598.14 and 7,509.38

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Solution

The fourth proportional to 13,478.15, 18,598.14 and 7,509.38 is: 10,361.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.15 : 18,598.14 = 7,509.38 : x
  2. Step 2: Convert to fraction form
    13,478.15/18,598.14 = 7,509.38/x
  3. Step 3: Cross multiply
    13,478.15x = 18,598.14 × 7,509.38
  4. Step 4: Simplify right side
    13,478.15x = 139,660,500.55
  5. Step 5: Solve for x
    x = 139,660,500.55/13,478.15
  6. Step 6: Final answer
    x = 10,361.99

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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.