Home / 7,921.70-10,931.94-4,385.15

Finding the Fourth Proportional to 7,921.70, 10,931.94 and 4,385.15

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Solution

The fourth proportional to 7,921.70, 10,931.94 and 4,385.15 is: 6,051.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.70 : 10,931.94 = 4,385.15 : x
  2. Step 2: Convert to fraction form
    7,921.70/10,931.94 = 4,385.15/x
  3. Step 3: Cross multiply
    7,921.70x = 10,931.94 × 4,385.15
  4. Step 4: Simplify right side
    7,921.70x = 47,938,142.03
  5. Step 5: Solve for x
    x = 47,938,142.03/7,921.70
  6. Step 6: Final answer
    x = 6,051.50

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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.