Home / 13,278.45-18,322.14-7,612.11

Finding the Fourth Proportional to 13,278.45, 18,322.14 and 7,612.11

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Solution

The fourth proportional to 13,278.45, 18,322.14 and 7,612.11 is: 10,503.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.45 : 18,322.14 = 7,612.11 : x
  2. Step 2: Convert to fraction form
    13,278.45/18,322.14 = 7,612.11/x
  3. Step 3: Cross multiply
    13,278.45x = 18,322.14 × 7,612.11
  4. Step 4: Simplify right side
    13,278.45x = 139,470,145.12
  5. Step 5: Solve for x
    x = 139,470,145.12/13,278.45
  6. Step 6: Final answer
    x = 10,503.50

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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.