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Finding the Fourth Proportional to 18,807.74, 28,208.36 and 5,656.58

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Solution

The fourth proportional to 18,807.74, 28,208.36 and 5,656.58 is: 8,483.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.74 : 28,208.36 = 5,656.58 : x
  2. Step 2: Convert to fraction form
    18,807.74/28,208.36 = 5,656.58/x
  3. Step 3: Cross multiply
    18,807.74x = 28,208.36 × 5,656.58
  4. Step 4: Simplify right side
    18,807.74x = 159,562,718.11
  5. Step 5: Solve for x
    x = 159,562,718.11/18,807.74
  6. Step 6: Final answer
    x = 8,483.89

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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.