Home / 15,690.30-21,643.57-9,399.03

Finding the Fourth Proportional to 15,690.30, 21,643.57 and 9,399.03

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Solution

The fourth proportional to 15,690.30, 21,643.57 and 9,399.03 is: 12,965.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.30 : 21,643.57 = 9,399.03 : x
  2. Step 2: Convert to fraction form
    15,690.30/21,643.57 = 9,399.03/x
  3. Step 3: Cross multiply
    15,690.30x = 21,643.57 × 9,399.03
  4. Step 4: Simplify right side
    15,690.30x = 203,428,563.74
  5. Step 5: Solve for x
    x = 203,428,563.74/15,690.30
  6. Step 6: Final answer
    x = 12,965.24

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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.