Home / 21,407.49-29,541.60-11,847.78

Finding the Fourth Proportional to 21,407.49, 29,541.60 and 11,847.78

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Solution

The fourth proportional to 21,407.49, 29,541.60 and 11,847.78 is: 16,349.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.49 : 29,541.60 = 11,847.78 : x
  2. Step 2: Convert to fraction form
    21,407.49/29,541.60 = 11,847.78/x
  3. Step 3: Cross multiply
    21,407.49x = 29,541.60 × 11,847.78
  4. Step 4: Simplify right side
    21,407.49x = 350,002,422.08
  5. Step 5: Solve for x
    x = 350,002,422.08/21,407.49
  6. Step 6: Final answer
    x = 16,349.53

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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.