Home / 15,065.40-20,786.04-8,776.56

Finding the Fourth Proportional to 15,065.40, 20,786.04 and 8,776.56

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Solution

The fourth proportional to 15,065.40, 20,786.04 and 8,776.56 is: 12,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.40 : 20,786.04 = 8,776.56 : x
  2. Step 2: Convert to fraction form
    15,065.40/20,786.04 = 8,776.56/x
  3. Step 3: Cross multiply
    15,065.40x = 20,786.04 × 8,776.56
  4. Step 4: Simplify right side
    15,065.40x = 182,429,927.22
  5. Step 5: Solve for x
    x = 182,429,927.22/15,065.40
  6. Step 6: Final answer
    x = 12,109.20

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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.