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Finding the Fourth Proportional to 19,813.58, 27,342.72 and 10,861.16

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Solution

The fourth proportional to 19,813.58, 27,342.72 and 10,861.16 is: 14,988.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,813.58 : 27,342.72 = 10,861.16 : x
  2. Step 2: Convert to fraction form
    19,813.58/27,342.72 = 10,861.16/x
  3. Step 3: Cross multiply
    19,813.58x = 27,342.72 × 10,861.16
  4. Step 4: Simplify right side
    19,813.58x = 296,973,656.76
  5. Step 5: Solve for x
    x = 296,973,656.76/19,813.58
  6. Step 6: Final answer
    x = 14,988.39

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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.