Home / 15,643.88-21,588.55-9,356.25

Finding the Fourth Proportional to 15,643.88, 21,588.55 and 9,356.25

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Solution

The fourth proportional to 15,643.88, 21,588.55 and 9,356.25 is: 12,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,643.88 : 21,588.55 = 9,356.25 : x
  2. Step 2: Convert to fraction form
    15,643.88/21,588.55 = 9,356.25/x
  3. Step 3: Cross multiply
    15,643.88x = 21,588.55 × 9,356.25
  4. Step 4: Simplify right side
    15,643.88x = 201,987,847.55
  5. Step 5: Solve for x
    x = 201,987,847.55/15,643.88
  6. Step 6: Final answer
    x = 12,911.63

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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.