Home / 15,665.08-21,605.23-13,772.62

Finding the Fourth Proportional to 15,665.08, 21,605.23 and 13,772.62

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Solution

The fourth proportional to 15,665.08, 21,605.23 and 13,772.62 is: 18,995.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,665.08 : 21,605.23 = 13,772.62 : x
  2. Step 2: Convert to fraction form
    15,665.08/21,605.23 = 13,772.62/x
  3. Step 3: Cross multiply
    15,665.08x = 21,605.23 × 13,772.62
  4. Step 4: Simplify right side
    15,665.08x = 297,560,622.80
  5. Step 5: Solve for x
    x = 297,560,622.80/15,665.08
  6. Step 6: Final answer
    x = 18,995.16

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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.