Home / 21,303.57-31,959.96-8,155.94

Finding the Fourth Proportional to 21,303.57, 31,959.96 and 8,155.94

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Solution

The fourth proportional to 21,303.57, 31,959.96 and 8,155.94 is: 12,235.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.57 : 31,959.96 = 8,155.94 : x
  2. Step 2: Convert to fraction form
    21,303.57/31,959.96 = 8,155.94/x
  3. Step 3: Cross multiply
    21,303.57x = 31,959.96 × 8,155.94
  4. Step 4: Simplify right side
    21,303.57x = 260,663,456.65
  5. Step 5: Solve for x
    x = 260,663,456.65/21,303.57
  6. Step 6: Final answer
    x = 12,235.67

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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.