Home / 21,365.37-29,479.19-12,407.49

Finding the Fourth Proportional to 21,365.37, 29,479.19 and 12,407.49

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Solution

The fourth proportional to 21,365.37, 29,479.19 and 12,407.49 is: 17,119.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.37 : 29,479.19 = 12,407.49 : x
  2. Step 2: Convert to fraction form
    21,365.37/29,479.19 = 12,407.49/x
  3. Step 3: Cross multiply
    21,365.37x = 29,479.19 × 12,407.49
  4. Step 4: Simplify right side
    21,365.37x = 365,762,693.10
  5. Step 5: Solve for x
    x = 365,762,693.10/21,365.37
  6. Step 6: Final answer
    x = 17,119.42

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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.