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Finding the Fourth Proportional to 14,555.60, 21,822.60 and 4,689.20

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Solution

The fourth proportional to 14,555.60, 21,822.60 and 4,689.20 is: 7,030.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,555.60 : 21,822.60 = 4,689.20 : x
  2. Step 2: Convert to fraction form
    14,555.60/21,822.60 = 4,689.20/x
  3. Step 3: Cross multiply
    14,555.60x = 21,822.60 × 4,689.20
  4. Step 4: Simplify right side
    14,555.60x = 102,330,535.92
  5. Step 5: Solve for x
    x = 102,330,535.92/14,555.60
  6. Step 6: Final answer
    x = 7,030.32

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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.