Home / 28,305.06-39,059.46-15,729

Finding the Fourth Proportional to 28,305.06, 39,059.46 and 15,729

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Solution

The fourth proportional to 28,305.06, 39,059.46 and 15,729 is: 21,705.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.06 : 39,059.46 = 15,729 : x
  2. Step 2: Convert to fraction form
    28,305.06/39,059.46 = 15,729/x
  3. Step 3: Cross multiply
    28,305.06x = 39,059.46 × 15,729
  4. Step 4: Simplify right side
    28,305.06x = 614,366,246.34
  5. Step 5: Solve for x
    x = 614,366,246.34/28,305.06
  6. Step 6: Final answer
    x = 21,705.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.