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Finding the Fourth Proportional to 20,967.71, 28,933.70 and 12,352.55

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Solution

The fourth proportional to 20,967.71, 28,933.70 and 12,352.55 is: 17,045.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.71 : 28,933.70 = 12,352.55 : x
  2. Step 2: Convert to fraction form
    20,967.71/28,933.70 = 12,352.55/x
  3. Step 3: Cross multiply
    20,967.71x = 28,933.70 × 12,352.55
  4. Step 4: Simplify right side
    20,967.71x = 357,404,769.50
  5. Step 5: Solve for x
    x = 357,404,769.50/20,967.71
  6. Step 6: Final answer
    x = 17,045.49

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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.