Home / 21,931.86-30,246.84-15,545.82

Finding the Fourth Proportional to 21,931.86, 30,246.84 and 15,545.82

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Solution

The fourth proportional to 21,931.86, 30,246.84 and 15,545.82 is: 21,439.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.86 : 30,246.84 = 15,545.82 : x
  2. Step 2: Convert to fraction form
    21,931.86/30,246.84 = 15,545.82/x
  3. Step 3: Cross multiply
    21,931.86x = 30,246.84 × 15,545.82
  4. Step 4: Simplify right side
    21,931.86x = 470,211,930.21
  5. Step 5: Solve for x
    x = 470,211,930.21/21,931.86
  6. Step 6: Final answer
    x = 21,439.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.