Home / 28,651.80-42,953.40-11,133.84

Finding the Fourth Proportional to 28,651.80, 42,953.40 and 11,133.84

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Solution

The fourth proportional to 28,651.80, 42,953.40 and 11,133.84 is: 16,691.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,651.80 : 42,953.40 = 11,133.84 : x
  2. Step 2: Convert to fraction form
    28,651.80/42,953.40 = 11,133.84/x
  3. Step 3: Cross multiply
    28,651.80x = 42,953.40 × 11,133.84
  4. Step 4: Simplify right side
    28,651.80x = 478,236,283.06
  5. Step 5: Solve for x
    x = 478,236,283.06/28,651.80
  6. Step 6: Final answer
    x = 16,691.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.