Home / 15,158.39-20,918.60-8,786.22

Finding the Fourth Proportional to 15,158.39, 20,918.60 and 8,786.22

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Solution

The fourth proportional to 15,158.39, 20,918.60 and 8,786.22 is: 12,125.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.39 : 20,918.60 = 8,786.22 : x
  2. Step 2: Convert to fraction form
    15,158.39/20,918.60 = 8,786.22/x
  3. Step 3: Cross multiply
    15,158.39x = 20,918.60 × 8,786.22
  4. Step 4: Simplify right side
    15,158.39x = 183,795,421.69
  5. Step 5: Solve for x
    x = 183,795,421.69/15,158.39
  6. Step 6: Final answer
    x = 12,125.00

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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.