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Finding the Fourth Proportional to 15,178.68, 20,948.22 and 9,210.60

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Solution

The fourth proportional to 15,178.68, 20,948.22 and 9,210.60 is: 12,711.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,178.68 : 20,948.22 = 9,210.60 : x
  2. Step 2: Convert to fraction form
    15,178.68/20,948.22 = 9,210.60/x
  3. Step 3: Cross multiply
    15,178.68x = 20,948.22 × 9,210.60
  4. Step 4: Simplify right side
    15,178.68x = 192,945,675.13
  5. Step 5: Solve for x
    x = 192,945,675.13/15,178.68
  6. Step 6: Final answer
    x = 12,711.62

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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.