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Finding the Fourth Proportional to 15,797.04, 21,798.14 and 8,721.68

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Solution

The fourth proportional to 15,797.04, 21,798.14 and 8,721.68 is: 12,034.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,797.04 : 21,798.14 = 8,721.68 : x
  2. Step 2: Convert to fraction form
    15,797.04/21,798.14 = 8,721.68/x
  3. Step 3: Cross multiply
    15,797.04x = 21,798.14 × 8,721.68
  4. Step 4: Simplify right side
    15,797.04x = 190,116,401.68
  5. Step 5: Solve for x
    x = 190,116,401.68/15,797.04
  6. Step 6: Final answer
    x = 12,034.94

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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.