Home / 21,280.18-31,919.68-6,488.50

Finding the Fourth Proportional to 21,280.18, 31,919.68 and 6,488.50

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Solution

The fourth proportional to 21,280.18, 31,919.68 and 6,488.50 is: 9,732.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.18 : 31,919.68 = 6,488.50 : x
  2. Step 2: Convert to fraction form
    21,280.18/31,919.68 = 6,488.50/x
  3. Step 3: Cross multiply
    21,280.18x = 31,919.68 × 6,488.50
  4. Step 4: Simplify right side
    21,280.18x = 207,110,843.68
  5. Step 5: Solve for x
    x = 207,110,843.68/21,280.18
  6. Step 6: Final answer
    x = 9,732.57

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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.