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Finding the Fourth Proportional to 5,281.04, 7,921.02 and 1,385.12

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Solution

The fourth proportional to 5,281.04, 7,921.02 and 1,385.12 is: 2,077.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.04 : 7,921.02 = 1,385.12 : x
  2. Step 2: Convert to fraction form
    5,281.04/7,921.02 = 1,385.12/x
  3. Step 3: Cross multiply
    5,281.04x = 7,921.02 × 1,385.12
  4. Step 4: Simplify right side
    5,281.04x = 10,971,563.22
  5. Step 5: Solve for x
    x = 10,971,563.22/5,281.04
  6. Step 6: Final answer
    x = 2,077.54

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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.