Home / 10,964.87-15,131.31-6,428.67

Finding the Fourth Proportional to 10,964.87, 15,131.31 and 6,428.67

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Solution

The fourth proportional to 10,964.87, 15,131.31 and 6,428.67 is: 8,871.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,964.87 : 15,131.31 = 6,428.67 : x
  2. Step 2: Convert to fraction form
    10,964.87/15,131.31 = 6,428.67/x
  3. Step 3: Cross multiply
    10,964.87x = 15,131.31 × 6,428.67
  4. Step 4: Simplify right side
    10,964.87x = 97,274,117.81
  5. Step 5: Solve for x
    x = 97,274,117.81/10,964.87
  6. Step 6: Final answer
    x = 8,871.43

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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.