Home / 5,815.80-8,024.40-3,931.20

Finding the Fourth Proportional to 5,815.80, 8,024.40 and 3,931.20

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Solution

The fourth proportional to 5,815.80, 8,024.40 and 3,931.20 is: 5,424.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.80 : 8,024.40 = 3,931.20 : x
  2. Step 2: Convert to fraction form
    5,815.80/8,024.40 = 3,931.20/x
  3. Step 3: Cross multiply
    5,815.80x = 8,024.40 × 3,931.20
  4. Step 4: Simplify right side
    5,815.80x = 31,545,521.28
  5. Step 5: Solve for x
    x = 31,545,521.28/5,815.80
  6. Step 6: Final answer
    x = 5,424.11

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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.