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Finding the Fourth Proportional to 12,491.60, 18,737.40 and 10,187.60

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Solution

The fourth proportional to 12,491.60, 18,737.40 and 10,187.60 is: 15,281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.60 : 18,737.40 = 10,187.60 : x
  2. Step 2: Convert to fraction form
    12,491.60/18,737.40 = 10,187.60/x
  3. Step 3: Cross multiply
    12,491.60x = 18,737.40 × 10,187.60
  4. Step 4: Simplify right side
    12,491.60x = 190,889,136.24
  5. Step 5: Solve for x
    x = 190,889,136.24/12,491.60
  6. Step 6: Final answer
    x = 15,281.40

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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.