Home / 21,389.72-29,519.40-11,957.72

Finding the Fourth Proportional to 21,389.72, 29,519.40 and 11,957.72

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Solution

The fourth proportional to 21,389.72, 29,519.40 and 11,957.72 is: 16,502.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.72 : 29,519.40 = 11,957.72 : x
  2. Step 2: Convert to fraction form
    21,389.72/29,519.40 = 11,957.72/x
  3. Step 3: Cross multiply
    21,389.72x = 29,519.40 × 11,957.72
  4. Step 4: Simplify right side
    21,389.72x = 352,984,719.77
  5. Step 5: Solve for x
    x = 352,984,719.77/21,389.72
  6. Step 6: Final answer
    x = 16,502.54

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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.