Home / 15,721.20-23,579.10-5,855.40

Finding the Fourth Proportional to 15,721.20, 23,579.10 and 5,855.40

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Solution

The fourth proportional to 15,721.20, 23,579.10 and 5,855.40 is: 8,782.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.20 : 23,579.10 = 5,855.40 : x
  2. Step 2: Convert to fraction form
    15,721.20/23,579.10 = 5,855.40/x
  3. Step 3: Cross multiply
    15,721.20x = 23,579.10 × 5,855.40
  4. Step 4: Simplify right side
    15,721.20x = 138,065,062.14
  5. Step 5: Solve for x
    x = 138,065,062.14/15,721.20
  6. Step 6: Final answer
    x = 8,782.09

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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.