Home / 21,931.61-30,246.49-15,545.57

Finding the Fourth Proportional to 21,931.61, 30,246.49 and 15,545.57

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Solution

The fourth proportional to 21,931.61, 30,246.49 and 15,545.57 is: 21,439.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.61 : 30,246.49 = 15,545.57 : x
  2. Step 2: Convert to fraction form
    21,931.61/30,246.49 = 15,545.57/x
  3. Step 3: Cross multiply
    21,931.61x = 30,246.49 × 15,545.57
  4. Step 4: Simplify right side
    21,931.61x = 470,198,927.55
  5. Step 5: Solve for x
    x = 470,198,927.55/21,931.61
  6. Step 6: Final answer
    x = 21,439.33

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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.