Home / 28,705.28-39,619.95-18,109.40

Finding the Fourth Proportional to 28,705.28, 39,619.95 and 18,109.40

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Solution

The fourth proportional to 28,705.28, 39,619.95 and 18,109.40 is: 24,995.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,705.28 : 39,619.95 = 18,109.40 : x
  2. Step 2: Convert to fraction form
    28,705.28/39,619.95 = 18,109.40/x
  3. Step 3: Cross multiply
    28,705.28x = 39,619.95 × 18,109.40
  4. Step 4: Simplify right side
    28,705.28x = 717,493,522.53
  5. Step 5: Solve for x
    x = 717,493,522.53/28,705.28
  6. Step 6: Final answer
    x = 24,995.18

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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.