Home / 12,621.52-18,919.52-5,215.76

Finding the Fourth Proportional to 12,621.52, 18,919.52 and 5,215.76

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Solution

The fourth proportional to 12,621.52, 18,919.52 and 5,215.76 is: 7,818.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,621.52 : 18,919.52 = 5,215.76 : x
  2. Step 2: Convert to fraction form
    12,621.52/18,919.52 = 5,215.76/x
  3. Step 3: Cross multiply
    12,621.52x = 18,919.52 × 5,215.76
  4. Step 4: Simplify right side
    12,621.52x = 98,679,675.64
  5. Step 5: Solve for x
    x = 98,679,675.64/12,621.52
  6. Step 6: Final answer
    x = 7,818.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.