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Finding the Fourth Proportional to 14,392.41, 21,574.03 and 6,990.63

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Solution

The fourth proportional to 14,392.41, 21,574.03 and 6,990.63 is: 10,478.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,392.41 : 21,574.03 = 6,990.63 : x
  2. Step 2: Convert to fraction form
    14,392.41/21,574.03 = 6,990.63/x
  3. Step 3: Cross multiply
    14,392.41x = 21,574.03 × 6,990.63
  4. Step 4: Simplify right side
    14,392.41x = 150,816,061.34
  5. Step 5: Solve for x
    x = 150,816,061.34/14,392.41
  6. Step 6: Final answer
    x = 10,478.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.