Home / 21,280.38-31,920.98-6,488.36

Finding the Fourth Proportional to 21,280.38, 31,920.98 and 6,488.36

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Solution

The fourth proportional to 21,280.38, 31,920.98 and 6,488.36 is: 9,732.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.38 : 31,920.98 = 6,488.36 : x
  2. Step 2: Convert to fraction form
    21,280.38/31,920.98 = 6,488.36/x
  3. Step 3: Cross multiply
    21,280.38x = 31,920.98 × 6,488.36
  4. Step 4: Simplify right side
    21,280.38x = 207,114,809.79
  5. Step 5: Solve for x
    x = 207,114,809.79/21,280.38
  6. Step 6: Final answer
    x = 9,732.67

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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.