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Finding the Fourth Proportional to 21,330.63, 31,995.81 and 7,283.88

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Solution

The fourth proportional to 21,330.63, 31,995.81 and 7,283.88 is: 10,925.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.63 : 31,995.81 = 7,283.88 : x
  2. Step 2: Convert to fraction form
    21,330.63/31,995.81 = 7,283.88/x
  3. Step 3: Cross multiply
    21,330.63x = 31,995.81 × 7,283.88
  4. Step 4: Simplify right side
    21,330.63x = 233,053,640.54
  5. Step 5: Solve for x
    x = 233,053,640.54/21,330.63
  6. Step 6: Final answer
    x = 10,925.77

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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.