Home / 15,690.13-21,654.65-9,403.09

Finding the Fourth Proportional to 15,690.13, 21,654.65 and 9,403.09

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Solution

The fourth proportional to 15,690.13, 21,654.65 and 9,403.09 is: 12,977.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.13 : 21,654.65 = 9,403.09 : x
  2. Step 2: Convert to fraction form
    15,690.13/21,654.65 = 9,403.09/x
  3. Step 3: Cross multiply
    15,690.13x = 21,654.65 × 9,403.09
  4. Step 4: Simplify right side
    15,690.13x = 203,620,622.87
  5. Step 5: Solve for x
    x = 203,620,622.87/15,690.13
  6. Step 6: Final answer
    x = 12,977.62

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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.