Home / 15,790.11-21,780.60-9,412.41

Finding the Fourth Proportional to 15,790.11, 21,780.60 and 9,412.41

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Solution

The fourth proportional to 15,790.11, 21,780.60 and 9,412.41 is: 12,983.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.11 : 21,780.60 = 9,412.41 : x
  2. Step 2: Convert to fraction form
    15,790.11/21,780.60 = 9,412.41/x
  3. Step 3: Cross multiply
    15,790.11x = 21,780.60 × 9,412.41
  4. Step 4: Simplify right side
    15,790.11x = 205,007,937.25
  5. Step 5: Solve for x
    x = 205,007,937.25/15,790.11
  6. Step 6: Final answer
    x = 12,983.31

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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.