Home / 13,362.32-18,431.40-9,172.88

Finding the Fourth Proportional to 13,362.32, 18,431.40 and 9,172.88

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Solution

The fourth proportional to 13,362.32, 18,431.40 and 9,172.88 is: 12,652.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,362.32 : 18,431.40 = 9,172.88 : x
  2. Step 2: Convert to fraction form
    13,362.32/18,431.40 = 9,172.88/x
  3. Step 3: Cross multiply
    13,362.32x = 18,431.40 × 9,172.88
  4. Step 4: Simplify right side
    13,362.32x = 169,069,020.43
  5. Step 5: Solve for x
    x = 169,069,020.43/13,362.32
  6. Step 6: Final answer
    x = 12,652.67

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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.