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Finding the Fourth Proportional to 15,054.94, 20,775.76 and 8,681.50

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Solution

The fourth proportional to 15,054.94, 20,775.76 and 8,681.50 is: 11,980.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,054.94 : 20,775.76 = 8,681.50 : x
  2. Step 2: Convert to fraction form
    15,054.94/20,775.76 = 8,681.50/x
  3. Step 3: Cross multiply
    15,054.94x = 20,775.76 × 8,681.50
  4. Step 4: Simplify right side
    15,054.94x = 180,364,760.44
  5. Step 5: Solve for x
    x = 180,364,760.44/15,054.94
  6. Step 6: Final answer
    x = 11,980.44

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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.