Home / 18,639.50-25,743.84-12,661.16

Finding the Fourth Proportional to 18,639.50, 25,743.84 and 12,661.16

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Solution

The fourth proportional to 18,639.50, 25,743.84 and 12,661.16 is: 17,486.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.50 : 25,743.84 = 12,661.16 : x
  2. Step 2: Convert to fraction form
    18,639.50/25,743.84 = 12,661.16/x
  3. Step 3: Cross multiply
    18,639.50x = 25,743.84 × 12,661.16
  4. Step 4: Simplify right side
    18,639.50x = 325,946,877.25
  5. Step 5: Solve for x
    x = 325,946,877.25/18,639.50
  6. Step 6: Final answer
    x = 17,486.89

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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.