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Finding the Fourth Proportional to 21,283.59, 31,913.60 and 9,873.09

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Solution

The fourth proportional to 21,283.59, 31,913.60 and 9,873.09 is: 14,804.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.59 : 31,913.60 = 9,873.09 : x
  2. Step 2: Convert to fraction form
    21,283.59/31,913.60 = 9,873.09/x
  3. Step 3: Cross multiply
    21,283.59x = 31,913.60 × 9,873.09
  4. Step 4: Simplify right side
    21,283.59x = 315,085,795.66
  5. Step 5: Solve for x
    x = 315,085,795.66/21,283.59
  6. Step 6: Final answer
    x = 14,804.16

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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.