Home / 20,657.09-28,506.80-11,225.66

Finding the Fourth Proportional to 20,657.09, 28,506.80 and 11,225.66

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Solution

The fourth proportional to 20,657.09, 28,506.80 and 11,225.66 is: 15,491.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.09 : 28,506.80 = 11,225.66 : x
  2. Step 2: Convert to fraction form
    20,657.09/28,506.80 = 11,225.66/x
  3. Step 3: Cross multiply
    20,657.09x = 28,506.80 × 11,225.66
  4. Step 4: Simplify right side
    20,657.09x = 320,007,530.02
  5. Step 5: Solve for x
    x = 320,007,530.02/20,657.09
  6. Step 6: Final answer
    x = 15,491.41

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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.