Home / 15,617.21-21,551.74-8,543.78

Finding the Fourth Proportional to 15,617.21, 21,551.74 and 8,543.78

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Solution

The fourth proportional to 15,617.21, 21,551.74 and 8,543.78 is: 11,790.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,617.21 : 21,551.74 = 8,543.78 : x
  2. Step 2: Convert to fraction form
    15,617.21/21,551.74 = 8,543.78/x
  3. Step 3: Cross multiply
    15,617.21x = 21,551.74 × 8,543.78
  4. Step 4: Simplify right side
    15,617.21x = 184,133,196.06
  5. Step 5: Solve for x
    x = 184,133,196.06/15,617.21
  6. Step 6: Final answer
    x = 11,790.41

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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.