Home / 13,869.84-20,815.72-6,470.52

Finding the Fourth Proportional to 13,869.84, 20,815.72 and 6,470.52

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Solution

The fourth proportional to 13,869.84, 20,815.72 and 6,470.52 is: 9,710.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.84 : 20,815.72 = 6,470.52 : x
  2. Step 2: Convert to fraction form
    13,869.84/20,815.72 = 6,470.52/x
  3. Step 3: Cross multiply
    13,869.84x = 20,815.72 × 6,470.52
  4. Step 4: Simplify right side
    13,869.84x = 134,688,532.57
  5. Step 5: Solve for x
    x = 134,688,532.57/13,869.84
  6. Step 6: Final answer
    x = 9,710.89

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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.