Home / 15,294.40-21,107.31-8,920.51

Finding the Fourth Proportional to 15,294.40, 21,107.31 and 8,920.51

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Solution

The fourth proportional to 15,294.40, 21,107.31 and 8,920.51 is: 12,310.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,294.40 : 21,107.31 = 8,920.51 : x
  2. Step 2: Convert to fraction form
    15,294.40/21,107.31 = 8,920.51/x
  3. Step 3: Cross multiply
    15,294.40x = 21,107.31 × 8,920.51
  4. Step 4: Simplify right side
    15,294.40x = 188,287,969.93
  5. Step 5: Solve for x
    x = 188,287,969.93/15,294.40
  6. Step 6: Final answer
    x = 12,310.91

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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.