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Finding the Fourth Proportional to 25,988.76, 38,988.99 and 8,220.50

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Solution

The fourth proportional to 25,988.76, 38,988.99 and 8,220.50 is: 12,332.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,988.76 : 38,988.99 = 8,220.50 : x
  2. Step 2: Convert to fraction form
    25,988.76/38,988.99 = 8,220.50/x
  3. Step 3: Cross multiply
    25,988.76x = 38,988.99 × 8,220.50
  4. Step 4: Simplify right side
    25,988.76x = 320,508,797.35
  5. Step 5: Solve for x
    x = 320,508,797.35/25,988.76
  6. Step 6: Final answer
    x = 12,332.59

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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.