Home / 7,347.60-10,139.61-3,990.34

Finding the Fourth Proportional to 7,347.60, 10,139.61 and 3,990.34

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Solution

The fourth proportional to 7,347.60, 10,139.61 and 3,990.34 is: 5,506.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,347.60 : 10,139.61 = 3,990.34 : x
  2. Step 2: Convert to fraction form
    7,347.60/10,139.61 = 3,990.34/x
  3. Step 3: Cross multiply
    7,347.60x = 10,139.61 × 3,990.34
  4. Step 4: Simplify right side
    7,347.60x = 40,460,491.37
  5. Step 5: Solve for x
    x = 40,460,491.37/7,347.60
  6. Step 6: Final answer
    x = 5,506.63

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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.