Home / 20,677.60-28,526.83-13,505.08

Finding the Fourth Proportional to 20,677.60, 28,526.83 and 13,505.08

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Solution

The fourth proportional to 20,677.60, 28,526.83 and 13,505.08 is: 18,631.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,677.60 : 28,526.83 = 13,505.08 : x
  2. Step 2: Convert to fraction form
    20,677.60/28,526.83 = 13,505.08/x
  3. Step 3: Cross multiply
    20,677.60x = 28,526.83 × 13,505.08
  4. Step 4: Simplify right side
    20,677.60x = 385,257,145.67
  5. Step 5: Solve for x
    x = 385,257,145.67/20,677.60
  6. Step 6: Final answer
    x = 18,631.61

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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.