Home / 15,716.13-21,688.32-8,643.07

Finding the Fourth Proportional to 15,716.13, 21,688.32 and 8,643.07

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Solution

The fourth proportional to 15,716.13, 21,688.32 and 8,643.07 is: 11,927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,716.13 : 21,688.32 = 8,643.07 : x
  2. Step 2: Convert to fraction form
    15,716.13/21,688.32 = 8,643.07/x
  3. Step 3: Cross multiply
    15,716.13x = 21,688.32 × 8,643.07
  4. Step 4: Simplify right side
    15,716.13x = 187,453,667.94
  5. Step 5: Solve for x
    x = 187,453,667.94/15,716.13
  6. Step 6: Final answer
    x = 11,927.47

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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.