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Finding the Fourth Proportional to 8,470.98, 11,686.03 and 5,487.78

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Solution

The fourth proportional to 8,470.98, 11,686.03 and 5,487.78 is: 7,570.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,470.98 : 11,686.03 = 5,487.78 : x
  2. Step 2: Convert to fraction form
    8,470.98/11,686.03 = 5,487.78/x
  3. Step 3: Cross multiply
    8,470.98x = 11,686.03 × 5,487.78
  4. Step 4: Simplify right side
    8,470.98x = 64,130,361.71
  5. Step 5: Solve for x
    x = 64,130,361.71/8,470.98
  6. Step 6: Final answer
    x = 7,570.60

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1.5x scale

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.