Home / 21,033.53-31,543.46-6,989.78

Finding the Fourth Proportional to 21,033.53, 31,543.46 and 6,989.78

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Solution

The fourth proportional to 21,033.53, 31,543.46 and 6,989.78 is: 10,482.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,033.53 : 31,543.46 = 6,989.78 : x
  2. Step 2: Convert to fraction form
    21,033.53/31,543.46 = 6,989.78/x
  3. Step 3: Cross multiply
    21,033.53x = 31,543.46 × 6,989.78
  4. Step 4: Simplify right side
    21,033.53x = 220,481,845.84
  5. Step 5: Solve for x
    x = 220,481,845.84/21,033.53
  6. Step 6: Final answer
    x = 10,482.40

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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.