Home / 13,012.80-17,959.20-7,707.84

Finding the Fourth Proportional to 13,012.80, 17,959.20 and 7,707.84

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Solution

The fourth proportional to 13,012.80, 17,959.20 and 7,707.84 is: 10,637.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,012.80 : 17,959.20 = 7,707.84 : x
  2. Step 2: Convert to fraction form
    13,012.80/17,959.20 = 7,707.84/x
  3. Step 3: Cross multiply
    13,012.80x = 17,959.20 × 7,707.84
  4. Step 4: Simplify right side
    13,012.80x = 138,426,640.13
  5. Step 5: Solve for x
    x = 138,426,640.13/13,012.80
  6. Step 6: Final answer
    x = 10,637.73

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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.