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Finding the Fourth Proportional to 21,305.68, 29,387.28 and 14,033.68

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Solution

The fourth proportional to 21,305.68, 29,387.28 and 14,033.68 is: 19,356.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.68 : 29,387.28 = 14,033.68 : x
  2. Step 2: Convert to fraction form
    21,305.68/29,387.28 = 14,033.68/x
  3. Step 3: Cross multiply
    21,305.68x = 29,387.28 × 14,033.68
  4. Step 4: Simplify right side
    21,305.68x = 412,411,683.59
  5. Step 5: Solve for x
    x = 412,411,683.59/21,305.68
  6. Step 6: Final answer
    x = 19,356.89

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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.