Home / 20,705.83-28,566.75-13,539.94

Finding the Fourth Proportional to 20,705.83, 28,566.75 and 13,539.94

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Solution

The fourth proportional to 20,705.83, 28,566.75 and 13,539.94 is: 18,680.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.83 : 28,566.75 = 13,539.94 : x
  2. Step 2: Convert to fraction form
    20,705.83/28,566.75 = 13,539.94/x
  3. Step 3: Cross multiply
    20,705.83x = 28,566.75 × 13,539.94
  4. Step 4: Simplify right side
    20,705.83x = 386,791,972.01
  5. Step 5: Solve for x
    x = 386,791,972.01/20,705.83
  6. Step 6: Final answer
    x = 18,680.35

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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.