Home / 15,717.99-21,690.16-8,643.96

Finding the Fourth Proportional to 15,717.99, 21,690.16 and 8,643.96

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Solution

The fourth proportional to 15,717.99, 21,690.16 and 8,643.96 is: 11,928.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.99 : 21,690.16 = 8,643.96 : x
  2. Step 2: Convert to fraction form
    15,717.99/21,690.16 = 8,643.96/x
  3. Step 3: Cross multiply
    15,717.99x = 21,690.16 × 8,643.96
  4. Step 4: Simplify right side
    15,717.99x = 187,488,875.43
  5. Step 5: Solve for x
    x = 187,488,875.43/15,717.99
  6. Step 6: Final answer
    x = 11,928.30

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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.