Home / 21,939.48-30,270.42-12,737.70

Finding the Fourth Proportional to 21,939.48, 30,270.42 and 12,737.70

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Solution

The fourth proportional to 21,939.48, 30,270.42 and 12,737.70 is: 17,574.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.48 : 30,270.42 = 12,737.70 : x
  2. Step 2: Convert to fraction form
    21,939.48/30,270.42 = 12,737.70/x
  3. Step 3: Cross multiply
    21,939.48x = 30,270.42 × 12,737.70
  4. Step 4: Simplify right side
    21,939.48x = 385,575,528.83
  5. Step 5: Solve for x
    x = 385,575,528.83/21,939.48
  6. Step 6: Final answer
    x = 17,574.51

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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.