Home / 13,215.80-19,791.30-8,809.40

Finding the Fourth Proportional to 13,215.80, 19,791.30 and 8,809.40

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Solution

The fourth proportional to 13,215.80, 19,791.30 and 8,809.40 is: 13,192.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.80 : 19,791.30 = 8,809.40 : x
  2. Step 2: Convert to fraction form
    13,215.80/19,791.30 = 8,809.40/x
  3. Step 3: Cross multiply
    13,215.80x = 19,791.30 × 8,809.40
  4. Step 4: Simplify right side
    13,215.80x = 174,349,478.22
  5. Step 5: Solve for x
    x = 174,349,478.22/13,215.80
  6. Step 6: Final answer
    x = 13,192.50

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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.