Home / 20,657.79-28,505.50-11,705.13

Finding the Fourth Proportional to 20,657.79, 28,505.50 and 11,705.13

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Solution

The fourth proportional to 20,657.79, 28,505.50 and 11,705.13 is: 16,151.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.79 : 28,505.50 = 11,705.13 : x
  2. Step 2: Convert to fraction form
    20,657.79/28,505.50 = 11,705.13/x
  3. Step 3: Cross multiply
    20,657.79x = 28,505.50 × 11,705.13
  4. Step 4: Simplify right side
    20,657.79x = 333,660,583.22
  5. Step 5: Solve for x
    x = 333,660,583.22/20,657.79
  6. Step 6: Final answer
    x = 16,151.80

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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.