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Finding the Fourth Proportional to 21,533.90, 29,726.86 and 14,375.90

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Solution

The fourth proportional to 21,533.90, 29,726.86 and 14,375.90 is: 19,845.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,533.90 : 29,726.86 = 14,375.90 : x
  2. Step 2: Convert to fraction form
    21,533.90/29,726.86 = 14,375.90/x
  3. Step 3: Cross multiply
    21,533.90x = 29,726.86 × 14,375.90
  4. Step 4: Simplify right side
    21,533.90x = 427,350,366.67
  5. Step 5: Solve for x
    x = 427,350,366.67/21,533.90
  6. Step 6: Final answer
    x = 19,845.47

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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.