Home / 21,938.65-30,280.64-13,446.61

Finding the Fourth Proportional to 21,938.65, 30,280.64 and 13,446.61

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Solution

The fourth proportional to 21,938.65, 30,280.64 and 13,446.61 is: 18,559.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,938.65 : 30,280.64 = 13,446.61 : x
  2. Step 2: Convert to fraction form
    21,938.65/30,280.64 = 13,446.61/x
  3. Step 3: Cross multiply
    21,938.65x = 30,280.64 × 13,446.61
  4. Step 4: Simplify right side
    21,938.65x = 407,171,813.70
  5. Step 5: Solve for x
    x = 407,171,813.70/21,938.65
  6. Step 6: Final answer
    x = 18,559.57

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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.