Home / 18,512.43-25,547.36-10,128.75

Finding the Fourth Proportional to 18,512.43, 25,547.36 and 10,128.75

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Solution

The fourth proportional to 18,512.43, 25,547.36 and 10,128.75 is: 13,977.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,512.43 : 25,547.36 = 10,128.75 : x
  2. Step 2: Convert to fraction form
    18,512.43/25,547.36 = 10,128.75/x
  3. Step 3: Cross multiply
    18,512.43x = 25,547.36 × 10,128.75
  4. Step 4: Simplify right side
    18,512.43x = 258,762,822.60
  5. Step 5: Solve for x
    x = 258,762,822.60/18,512.43
  6. Step 6: Final answer
    x = 13,977.79

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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.