Home / 31,428.74-47,142.98-12,708.56

Finding the Fourth Proportional to 31,428.74, 47,142.98 and 12,708.56

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Solution

The fourth proportional to 31,428.74, 47,142.98 and 12,708.56 is: 19,062.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,428.74 : 47,142.98 = 12,708.56 : x
  2. Step 2: Convert to fraction form
    31,428.74/47,142.98 = 12,708.56/x
  3. Step 3: Cross multiply
    31,428.74x = 47,142.98 × 12,708.56
  4. Step 4: Simplify right side
    31,428.74x = 599,119,389.91
  5. Step 5: Solve for x
    x = 599,119,389.91/31,428.74
  6. Step 6: Final answer
    x = 19,062.79

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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.