Home / 15,446.57-21,316.12-8,640.51

Finding the Fourth Proportional to 15,446.57, 21,316.12 and 8,640.51

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Solution

The fourth proportional to 15,446.57, 21,316.12 and 8,640.51 is: 11,923.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,446.57 : 21,316.12 = 8,640.51 : x
  2. Step 2: Convert to fraction form
    15,446.57/21,316.12 = 8,640.51/x
  3. Step 3: Cross multiply
    15,446.57x = 21,316.12 × 8,640.51
  4. Step 4: Simplify right side
    15,446.57x = 184,182,104.82
  5. Step 5: Solve for x
    x = 184,182,104.82/15,446.57
  6. Step 6: Final answer
    x = 11,923.82

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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.