Home / 18,128.65-25,017.78-10,170.40

Finding the Fourth Proportional to 18,128.65, 25,017.78 and 10,170.40

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Solution

The fourth proportional to 18,128.65, 25,017.78 and 10,170.40 is: 14,035.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.65 : 25,017.78 = 10,170.40 : x
  2. Step 2: Convert to fraction form
    18,128.65/25,017.78 = 10,170.40/x
  3. Step 3: Cross multiply
    18,128.65x = 25,017.78 × 10,170.40
  4. Step 4: Simplify right side
    18,128.65x = 254,440,829.71
  5. Step 5: Solve for x
    x = 254,440,829.71/18,128.65
  6. Step 6: Final answer
    x = 14,035.29

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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.