Home / 20,730.80-31,088.46-6,687.29

Finding the Fourth Proportional to 20,730.80, 31,088.46 and 6,687.29

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Solution

The fourth proportional to 20,730.80, 31,088.46 and 6,687.29 is: 10,028.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.80 : 31,088.46 = 6,687.29 : x
  2. Step 2: Convert to fraction form
    20,730.80/31,088.46 = 6,687.29/x
  3. Step 3: Cross multiply
    20,730.80x = 31,088.46 × 6,687.29
  4. Step 4: Simplify right side
    20,730.80x = 207,897,547.67
  5. Step 5: Solve for x
    x = 207,897,547.67/20,730.80
  6. Step 6: Final answer
    x = 10,028.44

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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.