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Finding the Fourth Proportional to 15,055.15, 20,775.65 and 8,681.77

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Solution

The fourth proportional to 15,055.15, 20,775.65 and 8,681.77 is: 11,980.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,055.15 : 20,775.65 = 8,681.77 : x
  2. Step 2: Convert to fraction form
    15,055.15/20,775.65 = 8,681.77/x
  3. Step 3: Cross multiply
    15,055.15x = 20,775.65 × 8,681.77
  4. Step 4: Simplify right side
    15,055.15x = 180,369,414.90
  5. Step 5: Solve for x
    x = 180,369,414.90/15,055.15
  6. Step 6: Final answer
    x = 11,980.58

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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.