Home / 12,690.32-19,035.80-3,925.20

Finding the Fourth Proportional to 12,690.32, 19,035.80 and 3,925.20

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Solution

The fourth proportional to 12,690.32, 19,035.80 and 3,925.20 is: 5,887.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.32 : 19,035.80 = 3,925.20 : x
  2. Step 2: Convert to fraction form
    12,690.32/19,035.80 = 3,925.20/x
  3. Step 3: Cross multiply
    12,690.32x = 19,035.80 × 3,925.20
  4. Step 4: Simplify right side
    12,690.32x = 74,719,322.16
  5. Step 5: Solve for x
    x = 74,719,322.16/12,690.32
  6. Step 6: Final answer
    x = 5,887.90

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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.