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Finding the Fourth Proportional to 28,736.80, 39,649.03 and 16,803.07

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Solution

The fourth proportional to 28,736.80, 39,649.03 and 16,803.07 is: 23,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,736.80 : 39,649.03 = 16,803.07 : x
  2. Step 2: Convert to fraction form
    28,736.80/39,649.03 = 16,803.07/x
  3. Step 3: Cross multiply
    28,736.80x = 39,649.03 × 16,803.07
  4. Step 4: Simplify right side
    28,736.80x = 666,225,426.52
  5. Step 5: Solve for x
    x = 666,225,426.52/28,736.80
  6. Step 6: Final answer
    x = 23,183.70

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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.