Home / 21,871.26-30,182.76-12,440.16

Finding the Fourth Proportional to 21,871.26, 30,182.76 and 12,440.16

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Solution

The fourth proportional to 21,871.26, 30,182.76 and 12,440.16 is: 17,167.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.26 : 30,182.76 = 12,440.16 : x
  2. Step 2: Convert to fraction form
    21,871.26/30,182.76 = 12,440.16/x
  3. Step 3: Cross multiply
    21,871.26x = 30,182.76 × 12,440.16
  4. Step 4: Simplify right side
    21,871.26x = 375,478,363.64
  5. Step 5: Solve for x
    x = 375,478,363.64/21,871.26
  6. Step 6: Final answer
    x = 17,167.66

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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.