Home / 13,455.29-20,155.23-7,891.80

Finding the Fourth Proportional to 13,455.29, 20,155.23 and 7,891.80

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Solution

The fourth proportional to 13,455.29, 20,155.23 and 7,891.80 is: 11,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.29 : 20,155.23 = 7,891.80 : x
  2. Step 2: Convert to fraction form
    13,455.29/20,155.23 = 7,891.80/x
  3. Step 3: Cross multiply
    13,455.29x = 20,155.23 × 7,891.80
  4. Step 4: Simplify right side
    13,455.29x = 159,061,044.11
  5. Step 5: Solve for x
    x = 159,061,044.11/13,455.29
  6. Step 6: Final answer
    x = 11,821.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.