Home / 8,731.20-12,064.40-6,977.28

Finding the Fourth Proportional to 8,731.20, 12,064.40 and 6,977.28

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Solution

The fourth proportional to 8,731.20, 12,064.40 and 6,977.28 is: 9,640.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,731.20 : 12,064.40 = 6,977.28 : x
  2. Step 2: Convert to fraction form
    8,731.20/12,064.40 = 6,977.28/x
  3. Step 3: Cross multiply
    8,731.20x = 12,064.40 × 6,977.28
  4. Step 4: Simplify right side
    8,731.20x = 84,176,696.83
  5. Step 5: Solve for x
    x = 84,176,696.83/8,731.20
  6. Step 6: Final answer
    x = 9,640.91

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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.