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Finding the Fourth Proportional to 19,276.59, 28,895.19 and 10,939

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Solution

The fourth proportional to 19,276.59, 28,895.19 and 10,939 is: 16,397.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,276.59 : 28,895.19 = 10,939 : x
  2. Step 2: Convert to fraction form
    19,276.59/28,895.19 = 10,939/x
  3. Step 3: Cross multiply
    19,276.59x = 28,895.19 × 10,939
  4. Step 4: Simplify right side
    19,276.59x = 316,084,483.41
  5. Step 5: Solve for x
    x = 316,084,483.41/19,276.59
  6. Step 6: Final answer
    x = 16,397.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.