Home / 21,370.72-29,491.48-12,423.48

Finding the Fourth Proportional to 21,370.72, 29,491.48 and 12,423.48

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Solution

The fourth proportional to 21,370.72, 29,491.48 and 12,423.48 is: 17,144.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.72 : 29,491.48 = 12,423.48 : x
  2. Step 2: Convert to fraction form
    21,370.72/29,491.48 = 12,423.48/x
  3. Step 3: Cross multiply
    21,370.72x = 29,491.48 × 12,423.48
  4. Step 4: Simplify right side
    21,370.72x = 366,386,811.95
  5. Step 5: Solve for x
    x = 366,386,811.95/21,370.72
  6. Step 6: Final answer
    x = 17,144.34

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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.