Home / 13,390.76-18,476.58-7,725.16

Finding the Fourth Proportional to 13,390.76, 18,476.58 and 7,725.16

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Solution

The fourth proportional to 13,390.76, 18,476.58 and 7,725.16 is: 10,659.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.76 : 18,476.58 = 7,725.16 : x
  2. Step 2: Convert to fraction form
    13,390.76/18,476.58 = 7,725.16/x
  3. Step 3: Cross multiply
    13,390.76x = 18,476.58 × 7,725.16
  4. Step 4: Simplify right side
    13,390.76x = 142,734,536.75
  5. Step 5: Solve for x
    x = 142,734,536.75/13,390.76
  6. Step 6: Final answer
    x = 10,659.18

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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.