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Finding the Fourth Proportional to 8,588.40, 12,882.60 and 8,187.45

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Solution

The fourth proportional to 8,588.40, 12,882.60 and 8,187.45 is: 12,281.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,588.40 : 12,882.60 = 8,187.45 : x
  2. Step 2: Convert to fraction form
    8,588.40/12,882.60 = 8,187.45/x
  3. Step 3: Cross multiply
    8,588.40x = 12,882.60 × 8,187.45
  4. Step 4: Simplify right side
    8,588.40x = 105,475,643.37
  5. Step 5: Solve for x
    x = 105,475,643.37/8,588.40
  6. Step 6: Final answer
    x = 12,281.18

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1.5x scale

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.