Home / 21,359.44-29,475.60-12,407.20

Finding the Fourth Proportional to 21,359.44, 29,475.60 and 12,407.20

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Solution

The fourth proportional to 21,359.44, 29,475.60 and 12,407.20 is: 17,121.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,359.44 : 29,475.60 = 12,407.20 : x
  2. Step 2: Convert to fraction form
    21,359.44/29,475.60 = 12,407.20/x
  3. Step 3: Cross multiply
    21,359.44x = 29,475.60 × 12,407.20
  4. Step 4: Simplify right side
    21,359.44x = 365,709,664.32
  5. Step 5: Solve for x
    x = 365,709,664.32/21,359.44
  6. Step 6: Final answer
    x = 17,121.69

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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.