Home / 21,365.38-29,479.19-12,407.57

Finding the Fourth Proportional to 21,365.38, 29,479.19 and 12,407.57

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Solution

The fourth proportional to 21,365.38, 29,479.19 and 12,407.57 is: 17,119.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,365.38 : 29,479.19 = 12,407.57 : x
  2. Step 2: Convert to fraction form
    21,365.38/29,479.19 = 12,407.57/x
  3. Step 3: Cross multiply
    21,365.38x = 29,479.19 × 12,407.57
  4. Step 4: Simplify right side
    21,365.38x = 365,764,904.03
  5. Step 5: Solve for x
    x = 365,764,904.03/21,365.38
  6. Step 6: Final answer
    x = 17,119.52

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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.