Home / 15,158.89-20,919.29-8,786.72

Finding the Fourth Proportional to 15,158.89, 20,919.29 and 8,786.72

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Solution

The fourth proportional to 15,158.89, 20,919.29 and 8,786.72 is: 12,125.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.89 : 20,919.29 = 8,786.72 : x
  2. Step 2: Convert to fraction form
    15,158.89/20,919.29 = 8,786.72/x
  3. Step 3: Cross multiply
    15,158.89x = 20,919.29 × 8,786.72
  4. Step 4: Simplify right side
    15,158.89x = 183,811,943.83
  5. Step 5: Solve for x
    x = 183,811,943.83/15,158.89
  6. Step 6: Final answer
    x = 12,125.69

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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.