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Finding the Fourth Proportional to 14,477.76, 21,721.05 and 7,081.14

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Solution

The fourth proportional to 14,477.76, 21,721.05 and 7,081.14 is: 10,623.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,477.76 : 21,721.05 = 7,081.14 : x
  2. Step 2: Convert to fraction form
    14,477.76/21,721.05 = 7,081.14/x
  3. Step 3: Cross multiply
    14,477.76x = 21,721.05 × 7,081.14
  4. Step 4: Simplify right side
    14,477.76x = 153,809,877.45
  5. Step 5: Solve for x
    x = 153,809,877.45/14,477.76
  6. Step 6: Final answer
    x = 10,623.87

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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.