Home / 20,838.67-31,270.16-12,534.55

Finding the Fourth Proportional to 20,838.67, 31,270.16 and 12,534.55

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Solution

The fourth proportional to 20,838.67, 31,270.16 and 12,534.55 is: 18,809.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.67 : 31,270.16 = 12,534.55 : x
  2. Step 2: Convert to fraction form
    20,838.67/31,270.16 = 12,534.55/x
  3. Step 3: Cross multiply
    20,838.67x = 31,270.16 × 12,534.55
  4. Step 4: Simplify right side
    20,838.67x = 391,957,384.03
  5. Step 5: Solve for x
    x = 391,957,384.03/20,838.67
  6. Step 6: Final answer
    x = 18,809.14

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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.