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Finding the Fourth Proportional to 12,384.80, 18,588.80 and 6,545.60

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Solution

The fourth proportional to 12,384.80, 18,588.80 and 6,545.60 is: 9,824.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,384.80 : 18,588.80 = 6,545.60 : x
  2. Step 2: Convert to fraction form
    12,384.80/18,588.80 = 6,545.60/x
  3. Step 3: Cross multiply
    12,384.80x = 18,588.80 × 6,545.60
  4. Step 4: Simplify right side
    12,384.80x = 121,674,849.28
  5. Step 5: Solve for x
    x = 121,674,849.28/12,384.80
  6. Step 6: Final answer
    x = 9,824.53

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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.