Home / 12,980.32-19,470.20-4,215.22

Finding the Fourth Proportional to 12,980.32, 19,470.20 and 4,215.22

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Solution

The fourth proportional to 12,980.32, 19,470.20 and 4,215.22 is: 6,322.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,980.32 : 19,470.20 = 4,215.22 : x
  2. Step 2: Convert to fraction form
    12,980.32/19,470.20 = 4,215.22/x
  3. Step 3: Cross multiply
    12,980.32x = 19,470.20 × 4,215.22
  4. Step 4: Simplify right side
    12,980.32x = 82,071,176.44
  5. Step 5: Solve for x
    x = 82,071,176.44/12,980.32
  6. Step 6: Final answer
    x = 6,322.74

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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.