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Finding the Fourth Proportional to 18,724, 28,094.20 and 8,870.32

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Solution

The fourth proportional to 18,724, 28,094.20 and 8,870.32 is: 13,309.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,724 : 28,094.20 = 8,870.32 : x
  2. Step 2: Convert to fraction form
    18,724/28,094.20 = 8,870.32/x
  3. Step 3: Cross multiply
    18,724x = 28,094.20 × 8,870.32
  4. Step 4: Simplify right side
    18,724x = 249,204,544.14
  5. Step 5: Solve for x
    x = 249,204,544.14/18,724
  6. Step 6: Final answer
    x = 13,309.36

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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.