Home / 21,281.91-29,354.96-13,310.29

Finding the Fourth Proportional to 21,281.91, 29,354.96 and 13,310.29

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Solution

The fourth proportional to 21,281.91, 29,354.96 and 13,310.29 is: 18,359.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.91 : 29,354.96 = 13,310.29 : x
  2. Step 2: Convert to fraction form
    21,281.91/29,354.96 = 13,310.29/x
  3. Step 3: Cross multiply
    21,281.91x = 29,354.96 × 13,310.29
  4. Step 4: Simplify right side
    21,281.91x = 390,723,063.07
  5. Step 5: Solve for x
    x = 390,723,063.07/21,281.91
  6. Step 6: Final answer
    x = 18,359.40

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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.