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Finding the Fourth Proportional to 19,878.76, 27,432.90 and 10,804.12

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Solution

The fourth proportional to 19,878.76, 27,432.90 and 10,804.12 is: 14,909.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,878.76 : 27,432.90 = 10,804.12 : x
  2. Step 2: Convert to fraction form
    19,878.76/27,432.90 = 10,804.12/x
  3. Step 3: Cross multiply
    19,878.76x = 27,432.90 × 10,804.12
  4. Step 4: Simplify right side
    19,878.76x = 296,388,343.55
  5. Step 5: Solve for x
    x = 296,388,343.55/19,878.76
  6. Step 6: Final answer
    x = 14,909.80

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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.