Home / 28,000.04-38,640.06-15,424.80

Finding the Fourth Proportional to 28,000.04, 38,640.06 and 15,424.80

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Solution

The fourth proportional to 28,000.04, 38,640.06 and 15,424.80 is: 21,286.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000.04 : 38,640.06 = 15,424.80 : x
  2. Step 2: Convert to fraction form
    28,000.04/38,640.06 = 15,424.80/x
  3. Step 3: Cross multiply
    28,000.04x = 38,640.06 × 15,424.80
  4. Step 4: Simplify right side
    28,000.04x = 596,015,197.49
  5. Step 5: Solve for x
    x = 596,015,197.49/28,000.04
  6. Step 6: Final answer
    x = 21,286.23

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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.