Home / 21,136.80-31,705.20-6,345.84

Finding the Fourth Proportional to 21,136.80, 31,705.20 and 6,345.84

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Solution

The fourth proportional to 21,136.80, 31,705.20 and 6,345.84 is: 9,518.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.80 : 31,705.20 = 6,345.84 : x
  2. Step 2: Convert to fraction form
    21,136.80/31,705.20 = 6,345.84/x
  3. Step 3: Cross multiply
    21,136.80x = 31,705.20 × 6,345.84
  4. Step 4: Simplify right side
    21,136.80x = 201,196,126.37
  5. Step 5: Solve for x
    x = 201,196,126.37/21,136.80
  6. Step 6: Final answer
    x = 9,518.76

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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.