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Finding the Fourth Proportional to 20,347.88, 28,085.54 and 13,283.87

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Solution

The fourth proportional to 20,347.88, 28,085.54 and 13,283.87 is: 18,335.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.88 : 28,085.54 = 13,283.87 : x
  2. Step 2: Convert to fraction form
    20,347.88/28,085.54 = 13,283.87/x
  3. Step 3: Cross multiply
    20,347.88x = 28,085.54 × 13,283.87
  4. Step 4: Simplify right side
    20,347.88x = 373,084,455.39
  5. Step 5: Solve for x
    x = 373,084,455.39/20,347.88
  6. Step 6: Final answer
    x = 18,335.30

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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.