Home / 18,128.15-25,017.09-10,169.90

Finding the Fourth Proportional to 18,128.15, 25,017.09 and 10,169.90

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Solution

The fourth proportional to 18,128.15, 25,017.09 and 10,169.90 is: 14,034.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.15 : 25,017.09 = 10,169.90 : x
  2. Step 2: Convert to fraction form
    18,128.15/25,017.09 = 10,169.90/x
  3. Step 3: Cross multiply
    18,128.15x = 25,017.09 × 10,169.90
  4. Step 4: Simplify right side
    18,128.15x = 254,421,303.59
  5. Step 5: Solve for x
    x = 254,421,303.59/18,128.15
  6. Step 6: Final answer
    x = 14,034.60

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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.