Home / 21,139.84-31,710.40-6,348.80

Finding the Fourth Proportional to 21,139.84, 31,710.40 and 6,348.80

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Solution

The fourth proportional to 21,139.84, 31,710.40 and 6,348.80 is: 9,523.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.84 : 31,710.40 = 6,348.80 : x
  2. Step 2: Convert to fraction form
    21,139.84/31,710.40 = 6,348.80/x
  3. Step 3: Cross multiply
    21,139.84x = 31,710.40 × 6,348.80
  4. Step 4: Simplify right side
    21,139.84x = 201,322,987.52
  5. Step 5: Solve for x
    x = 201,322,987.52/21,139.84
  6. Step 6: Final answer
    x = 9,523.39

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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.