Home / 22,399.04-30,912-12,970.88

Finding the Fourth Proportional to 22,399.04, 30,912 and 12,970.88

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Solution

The fourth proportional to 22,399.04, 30,912 and 12,970.88 is: 17,900.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,399.04 : 30,912 = 12,970.88 : x
  2. Step 2: Convert to fraction form
    22,399.04/30,912 = 12,970.88/x
  3. Step 3: Cross multiply
    22,399.04x = 30,912 × 12,970.88
  4. Step 4: Simplify right side
    22,399.04x = 400,955,842.56
  5. Step 5: Solve for x
    x = 400,955,842.56/22,399.04
  6. Step 6: Final answer
    x = 17,900.58

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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.