Home / 9,680.40-13,358.64-5,431.56

Finding the Fourth Proportional to 9,680.40, 13,358.64 and 5,431.56

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Solution

The fourth proportional to 9,680.40, 13,358.64 and 5,431.56 is: 7,495.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,680.40 : 13,358.64 = 5,431.56 : x
  2. Step 2: Convert to fraction form
    9,680.40/13,358.64 = 5,431.56/x
  3. Step 3: Cross multiply
    9,680.40x = 13,358.64 × 5,431.56
  4. Step 4: Simplify right side
    9,680.40x = 72,558,254.68
  5. Step 5: Solve for x
    x = 72,558,254.68/9,680.40
  6. Step 6: Final answer
    x = 7,495.38

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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.