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Finding the Fourth Proportional to 21,775.40, 32,702.70 and 13,027.40

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Solution

The fourth proportional to 21,775.40, 32,702.70 and 13,027.40 is: 19,564.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,775.40 : 32,702.70 = 13,027.40 : x
  2. Step 2: Convert to fraction form
    21,775.40/32,702.70 = 13,027.40/x
  3. Step 3: Cross multiply
    21,775.40x = 32,702.70 × 13,027.40
  4. Step 4: Simplify right side
    21,775.40x = 426,031,153.98
  5. Step 5: Solve for x
    x = 426,031,153.98/21,775.40
  6. Step 6: Final answer
    x = 19,564.79

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1.5x scale

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.