Home / 21,943-30,281.70-12,516.76

Finding the Fourth Proportional to 21,943, 30,281.70 and 12,516.76

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Solution

The fourth proportional to 21,943, 30,281.70 and 12,516.76 is: 17,273.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,943 : 30,281.70 = 12,516.76 : x
  2. Step 2: Convert to fraction form
    21,943/30,281.70 = 12,516.76/x
  3. Step 3: Cross multiply
    21,943x = 30,281.70 × 12,516.76
  4. Step 4: Simplify right side
    21,943x = 379,028,771.29
  5. Step 5: Solve for x
    x = 379,028,771.29/21,943
  6. Step 6: Final answer
    x = 17,273.33

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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.