Home / 28,297.04-39,048.20-15,721.36

Finding the Fourth Proportional to 28,297.04, 39,048.20 and 15,721.36

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Solution

The fourth proportional to 28,297.04, 39,048.20 and 15,721.36 is: 21,694.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,297.04 : 39,048.20 = 15,721.36 : x
  2. Step 2: Convert to fraction form
    28,297.04/39,048.20 = 15,721.36/x
  3. Step 3: Cross multiply
    28,297.04x = 39,048.20 × 15,721.36
  4. Step 4: Simplify right side
    28,297.04x = 613,890,809.55
  5. Step 5: Solve for x
    x = 613,890,809.55/28,297.04
  6. Step 6: Final answer
    x = 21,694.52

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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.