Home / 10,928.12-15,054.46-8,689.28

Finding the Fourth Proportional to 10,928.12, 15,054.46 and 8,689.28

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Solution

The fourth proportional to 10,928.12, 15,054.46 and 8,689.28 is: 11,970.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,928.12 : 15,054.46 = 8,689.28 : x
  2. Step 2: Convert to fraction form
    10,928.12/15,054.46 = 8,689.28/x
  3. Step 3: Cross multiply
    10,928.12x = 15,054.46 × 8,689.28
  4. Step 4: Simplify right side
    10,928.12x = 130,812,321.19
  5. Step 5: Solve for x
    x = 130,812,321.19/10,928.12
  6. Step 6: Final answer
    x = 11,970.25

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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.