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Finding the Fourth Proportional to 28,777.58, 39,713.13 and 16,680.40

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Solution

The fourth proportional to 28,777.58, 39,713.13 and 16,680.40 is: 23,018.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,777.58 : 39,713.13 = 16,680.40 : x
  2. Step 2: Convert to fraction form
    28,777.58/39,713.13 = 16,680.40/x
  3. Step 3: Cross multiply
    28,777.58x = 39,713.13 × 16,680.40
  4. Step 4: Simplify right side
    28,777.58x = 662,430,893.65
  5. Step 5: Solve for x
    x = 662,430,893.65/28,777.58
  6. Step 6: Final answer
    x = 23,018.99

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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.