Home / 12,619.02-18,928.12-5,221.29

Finding the Fourth Proportional to 12,619.02, 18,928.12 and 5,221.29

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Solution

The fourth proportional to 12,619.02, 18,928.12 and 5,221.29 is: 7,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.02 : 18,928.12 = 5,221.29 : x
  2. Step 2: Convert to fraction form
    12,619.02/18,928.12 = 5,221.29/x
  3. Step 3: Cross multiply
    12,619.02x = 18,928.12 × 5,221.29
  4. Step 4: Simplify right side
    12,619.02x = 98,829,203.67
  5. Step 5: Solve for x
    x = 98,829,203.67/12,619.02
  6. Step 6: Final answer
    x = 7,831.77

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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.