Home / 5,271.40-7,908.18-1,985.32

Finding the Fourth Proportional to 5,271.40, 7,908.18 and 1,985.32

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Solution

The fourth proportional to 5,271.40, 7,908.18 and 1,985.32 is: 2,978.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,271.40 : 7,908.18 = 1,985.32 : x
  2. Step 2: Convert to fraction form
    5,271.40/7,908.18 = 1,985.32/x
  3. Step 3: Cross multiply
    5,271.40x = 7,908.18 × 1,985.32
  4. Step 4: Simplify right side
    5,271.40x = 15,700,267.92
  5. Step 5: Solve for x
    x = 15,700,267.92/5,271.40
  6. Step 6: Final answer
    x = 2,978.39

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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.