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Finding the Fourth Proportional to 28,672.66, 39,566.35 and 15,924.80

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Solution

The fourth proportional to 28,672.66, 39,566.35 and 15,924.80 is: 21,975.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.66 : 39,566.35 = 15,924.80 : x
  2. Step 2: Convert to fraction form
    28,672.66/39,566.35 = 15,924.80/x
  3. Step 3: Cross multiply
    28,672.66x = 39,566.35 × 15,924.80
  4. Step 4: Simplify right side
    28,672.66x = 630,086,210.48
  5. Step 5: Solve for x
    x = 630,086,210.48/28,672.66
  6. Step 6: Final answer
    x = 21,975.16

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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.