Home / 21,470.36-29,629.68-12,038.72

Finding the Fourth Proportional to 21,470.36, 29,629.68 and 12,038.72

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Solution

The fourth proportional to 21,470.36, 29,629.68 and 12,038.72 is: 16,613.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.36 : 29,629.68 = 12,038.72 : x
  2. Step 2: Convert to fraction form
    21,470.36/29,629.68 = 12,038.72/x
  3. Step 3: Cross multiply
    21,470.36x = 29,629.68 × 12,038.72
  4. Step 4: Simplify right side
    21,470.36x = 356,703,421.21
  5. Step 5: Solve for x
    x = 356,703,421.21/21,470.36
  6. Step 6: Final answer
    x = 16,613.76

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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.