Home / 31,905.49-47,861.61-13,186.93

Finding the Fourth Proportional to 31,905.49, 47,861.61 and 13,186.93

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Solution

The fourth proportional to 31,905.49, 47,861.61 and 13,186.93 is: 19,781.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,905.49 : 47,861.61 = 13,186.93 : x
  2. Step 2: Convert to fraction form
    31,905.49/47,861.61 = 13,186.93/x
  3. Step 3: Cross multiply
    31,905.49x = 47,861.61 × 13,186.93
  4. Step 4: Simplify right side
    31,905.49x = 631,147,700.76
  5. Step 5: Solve for x
    x = 631,147,700.76/31,905.49
  6. Step 6: Final answer
    x = 19,781.79

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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.