Home / 12,908.10-19,357.35-5,115.30

Finding the Fourth Proportional to 12,908.10, 19,357.35 and 5,115.30

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Solution

The fourth proportional to 12,908.10, 19,357.35 and 5,115.30 is: 7,671.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,908.10 : 19,357.35 = 5,115.30 : x
  2. Step 2: Convert to fraction form
    12,908.10/19,357.35 = 5,115.30/x
  3. Step 3: Cross multiply
    12,908.10x = 19,357.35 × 5,115.30
  4. Step 4: Simplify right side
    12,908.10x = 99,018,652.46
  5. Step 5: Solve for x
    x = 99,018,652.46/12,908.10
  6. Step 6: Final answer
    x = 7,671.05

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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.