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Finding the Fourth Proportional to 22,559.76, 31,133.64 and 13,130.64

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Solution

The fourth proportional to 22,559.76, 31,133.64 and 13,130.64 is: 18,120.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,559.76 : 31,133.64 = 13,130.64 : x
  2. Step 2: Convert to fraction form
    22,559.76/31,133.64 = 13,130.64/x
  3. Step 3: Cross multiply
    22,559.76x = 31,133.64 × 13,130.64
  4. Step 4: Simplify right side
    22,559.76x = 408,804,618.73
  5. Step 5: Solve for x
    x = 408,804,618.73/22,559.76
  6. Step 6: Final answer
    x = 18,120.96

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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.