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Finding the Fourth Proportional to 15,893.85, 21,889.12 and 15,549.47

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Solution

The fourth proportional to 15,893.85, 21,889.12 and 15,549.47 is: 21,414.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,893.85 : 21,889.12 = 15,549.47 : x
  2. Step 2: Convert to fraction form
    15,893.85/21,889.12 = 15,549.47/x
  3. Step 3: Cross multiply
    15,893.85x = 21,889.12 × 15,549.47
  4. Step 4: Simplify right side
    15,893.85x = 340,364,214.77
  5. Step 5: Solve for x
    x = 340,364,214.77/15,893.85
  6. Step 6: Final answer
    x = 21,414.84

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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.