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Finding the Fourth Proportional to 25,316.80, 37,942.80 and 12,140.80

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Solution

The fourth proportional to 25,316.80, 37,942.80 and 12,140.80 is: 18,195.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,316.80 : 37,942.80 = 12,140.80 : x
  2. Step 2: Convert to fraction form
    25,316.80/37,942.80 = 12,140.80/x
  3. Step 3: Cross multiply
    25,316.80x = 37,942.80 × 12,140.80
  4. Step 4: Simplify right side
    25,316.80x = 460,655,946.24
  5. Step 5: Solve for x
    x = 460,655,946.24/25,316.80
  6. Step 6: Final answer
    x = 18,195.66

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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.