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Finding the Fourth Proportional to 25,607.79, 38,411.69 and 8,078.99

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Solution

The fourth proportional to 25,607.79, 38,411.69 and 8,078.99 is: 12,118.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,607.79 : 38,411.69 = 8,078.99 : x
  2. Step 2: Convert to fraction form
    25,607.79/38,411.69 = 8,078.99/x
  3. Step 3: Cross multiply
    25,607.79x = 38,411.69 × 8,078.99
  4. Step 4: Simplify right side
    25,607.79x = 310,327,426.94
  5. Step 5: Solve for x
    x = 310,327,426.94/25,607.79
  6. Step 6: Final answer
    x = 12,118.48

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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.