Home / 21,211.47-31,768.74-10,125.95

Finding the Fourth Proportional to 21,211.47, 31,768.74 and 10,125.95

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Solution

The fourth proportional to 21,211.47, 31,768.74 and 10,125.95 is: 15,165.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.47 : 31,768.74 = 10,125.95 : x
  2. Step 2: Convert to fraction form
    21,211.47/31,768.74 = 10,125.95/x
  3. Step 3: Cross multiply
    21,211.47x = 31,768.74 × 10,125.95
  4. Step 4: Simplify right side
    21,211.47x = 321,688,513.96
  5. Step 5: Solve for x
    x = 321,688,513.96/21,211.47
  6. Step 6: Final answer
    x = 15,165.78

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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.