Home / 18,512.16-25,547.16-10,128.72

Finding the Fourth Proportional to 18,512.16, 25,547.16 and 10,128.72

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Solution

The fourth proportional to 18,512.16, 25,547.16 and 10,128.72 is: 13,977.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,512.16 : 25,547.16 = 10,128.72 : x
  2. Step 2: Convert to fraction form
    18,512.16/25,547.16 = 10,128.72/x
  3. Step 3: Cross multiply
    18,512.16x = 25,547.16 × 10,128.72
  4. Step 4: Simplify right side
    18,512.16x = 258,760,030.44
  5. Step 5: Solve for x
    x = 258,760,030.44/18,512.16
  6. Step 6: Final answer
    x = 13,977.84

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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.