Home / 8,689.04-11,990.40-4,912.64

Finding the Fourth Proportional to 8,689.04, 11,990.40 and 4,912.64

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Solution

The fourth proportional to 8,689.04, 11,990.40 and 4,912.64 is: 6,779.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.04 : 11,990.40 = 4,912.64 : x
  2. Step 2: Convert to fraction form
    8,689.04/11,990.40 = 4,912.64/x
  3. Step 3: Cross multiply
    8,689.04x = 11,990.40 × 4,912.64
  4. Step 4: Simplify right side
    8,689.04x = 58,904,518.66
  5. Step 5: Solve for x
    x = 58,904,518.66/8,689.04
  6. Step 6: Final answer
    x = 6,779.17

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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.