Home / 20,705.15-28,562.60-13,539.29

Finding the Fourth Proportional to 20,705.15, 28,562.60 and 13,539.29

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Solution

The fourth proportional to 20,705.15, 28,562.60 and 13,539.29 is: 18,677.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.15 : 28,562.60 = 13,539.29 : x
  2. Step 2: Convert to fraction form
    20,705.15/28,562.60 = 13,539.29/x
  3. Step 3: Cross multiply
    20,705.15x = 28,562.60 × 13,539.29
  4. Step 4: Simplify right side
    20,705.15x = 386,717,114.04
  5. Step 5: Solve for x
    x = 386,717,114.04/20,705.15
  6. Step 6: Final answer
    x = 18,677.34

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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.