Home / 21,155.59-29,207.98-13,615.01

Finding the Fourth Proportional to 21,155.59, 29,207.98 and 13,615.01

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Solution

The fourth proportional to 21,155.59, 29,207.98 and 13,615.01 is: 18,797.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.59 : 29,207.98 = 13,615.01 : x
  2. Step 2: Convert to fraction form
    21,155.59/29,207.98 = 13,615.01/x
  3. Step 3: Cross multiply
    21,155.59x = 29,207.98 × 13,615.01
  4. Step 4: Simplify right side
    21,155.59x = 397,666,843.70
  5. Step 5: Solve for x
    x = 397,666,843.70/21,155.59
  6. Step 6: Final answer
    x = 18,797.25

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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.