Home / 21,300.20-31,950.30-5,719.40

Finding the Fourth Proportional to 21,300.20, 31,950.30 and 5,719.40

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Solution

The fourth proportional to 21,300.20, 31,950.30 and 5,719.40 is: 8,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,300.20 : 31,950.30 = 5,719.40 : x
  2. Step 2: Convert to fraction form
    21,300.20/31,950.30 = 5,719.40/x
  3. Step 3: Cross multiply
    21,300.20x = 31,950.30 × 5,719.40
  4. Step 4: Simplify right side
    21,300.20x = 182,736,545.82
  5. Step 5: Solve for x
    x = 182,736,545.82/21,300.20
  6. Step 6: Final answer
    x = 8,579.10

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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.