Home / 10,528.40-15,811.32-9,091.28

Finding the Fourth Proportional to 10,528.40, 15,811.32 and 9,091.28

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Solution

The fourth proportional to 10,528.40, 15,811.32 and 9,091.28 is: 13,653.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,528.40 : 15,811.32 = 9,091.28 : x
  2. Step 2: Convert to fraction form
    10,528.40/15,811.32 = 9,091.28/x
  3. Step 3: Cross multiply
    10,528.40x = 15,811.32 × 9,091.28
  4. Step 4: Simplify right side
    10,528.40x = 143,745,137.29
  5. Step 5: Solve for x
    x = 143,745,137.29/10,528.40
  6. Step 6: Final answer
    x = 13,653.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.