Home / 21,331.54-29,423.82-12,948.04

Finding the Fourth Proportional to 21,331.54, 29,423.82 and 12,948.04

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Solution

The fourth proportional to 21,331.54, 29,423.82 and 12,948.04 is: 17,859.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.54 : 29,423.82 = 12,948.04 : x
  2. Step 2: Convert to fraction form
    21,331.54/29,423.82 = 12,948.04/x
  3. Step 3: Cross multiply
    21,331.54x = 29,423.82 × 12,948.04
  4. Step 4: Simplify right side
    21,331.54x = 380,980,798.31
  5. Step 5: Solve for x
    x = 380,980,798.31/21,331.54
  6. Step 6: Final answer
    x = 17,859.98

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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.