Home / 21,268.53-29,313.48-15,591.21

Finding the Fourth Proportional to 21,268.53, 29,313.48 and 15,591.21

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Solution

The fourth proportional to 21,268.53, 29,313.48 and 15,591.21 is: 21,488.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.53 : 29,313.48 = 15,591.21 : x
  2. Step 2: Convert to fraction form
    21,268.53/29,313.48 = 15,591.21/x
  3. Step 3: Cross multiply
    21,268.53x = 29,313.48 × 15,591.21
  4. Step 4: Simplify right side
    21,268.53x = 457,032,622.51
  5. Step 5: Solve for x
    x = 457,032,622.51/21,268.53
  6. Step 6: Final answer
    x = 21,488.68

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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.