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Finding the Fourth Proportional to 8,470.65, 11,688.53 and 4,692.87

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Solution

The fourth proportional to 8,470.65, 11,688.53 and 4,692.87 is: 6,475.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,470.65 : 11,688.53 = 4,692.87 : x
  2. Step 2: Convert to fraction form
    8,470.65/11,688.53 = 4,692.87/x
  3. Step 3: Cross multiply
    8,470.65x = 11,688.53 × 4,692.87
  4. Step 4: Simplify right side
    8,470.65x = 54,852,728.32
  5. Step 5: Solve for x
    x = 54,852,728.32/8,470.65
  6. Step 6: Final answer
    x = 6,475.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.