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Finding the Fourth Proportional to 15,475.00, 21,355.75 and 8,760.45

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Solution

The fourth proportional to 15,475.00, 21,355.75 and 8,760.45 is: 12,089.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,475.00 : 21,355.75 = 8,760.45 : x
  2. Step 2: Convert to fraction form
    15,475.00/21,355.75 = 8,760.45/x
  3. Step 3: Cross multiply
    15,475.00x = 21,355.75 × 8,760.45
  4. Step 4: Simplify right side
    15,475.00x = 187,086,071.12
  5. Step 5: Solve for x
    x = 187,086,071.12/15,475.00
  6. Step 6: Final answer
    x = 12,089.57

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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.