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Finding the Fourth Proportional to 28,980.52, 39,988.90 and 16,713.80

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Solution

The fourth proportional to 28,980.52, 39,988.90 and 16,713.80 is: 23,062.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,980.52 : 39,988.90 = 16,713.80 : x
  2. Step 2: Convert to fraction form
    28,980.52/39,988.90 = 16,713.80/x
  3. Step 3: Cross multiply
    28,980.52x = 39,988.90 × 16,713.80
  4. Step 4: Simplify right side
    28,980.52x = 668,366,476.82
  5. Step 5: Solve for x
    x = 668,366,476.82/28,980.52
  6. Step 6: Final answer
    x = 23,062.61

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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.