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Finding the Fourth Proportional to 15,775.00, 21,769.40 and 8,701.43

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Solution

The fourth proportional to 15,775.00, 21,769.40 and 8,701.43 is: 12,007.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,775.00 : 21,769.40 = 8,701.43 : x
  2. Step 2: Convert to fraction form
    15,775.00/21,769.40 = 8,701.43/x
  3. Step 3: Cross multiply
    15,775.00x = 21,769.40 × 8,701.43
  4. Step 4: Simplify right side
    15,775.00x = 189,424,823.15
  5. Step 5: Solve for x
    x = 189,424,823.15/15,775.00
  6. Step 6: Final answer
    x = 12,007.91

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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.