Home / 3,988.50-5,503.70-2,309.76

Finding the Fourth Proportional to 3,988.50, 5,503.70 and 2,309.76

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Solution

The fourth proportional to 3,988.50, 5,503.70 and 2,309.76 is: 3,187.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988.50 : 5,503.70 = 2,309.76 : x
  2. Step 2: Convert to fraction form
    3,988.50/5,503.70 = 2,309.76/x
  3. Step 3: Cross multiply
    3,988.50x = 5,503.70 × 2,309.76
  4. Step 4: Simplify right side
    3,988.50x = 12,712,226.11
  5. Step 5: Solve for x
    x = 12,712,226.11/3,988.50
  6. Step 6: Final answer
    x = 3,187.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.