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Finding the Fourth Proportional to 25,428.63, 38,142.95 and 7,898.46

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Solution

The fourth proportional to 25,428.63, 38,142.95 and 7,898.46 is: 11,847.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,428.63 : 38,142.95 = 7,898.46 : x
  2. Step 2: Convert to fraction form
    25,428.63/38,142.95 = 7,898.46/x
  3. Step 3: Cross multiply
    25,428.63x = 38,142.95 × 7,898.46
  4. Step 4: Simplify right side
    25,428.63x = 301,270,564.86
  5. Step 5: Solve for x
    x = 301,270,564.86/25,428.63
  6. Step 6: Final answer
    x = 11,847.69

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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.