Home / 31,781.21-47,661.35-10,715.56

Finding the Fourth Proportional to 31,781.21, 47,661.35 and 10,715.56

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Solution

The fourth proportional to 31,781.21, 47,661.35 and 10,715.56 is: 16,069.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,781.21 : 47,661.35 = 10,715.56 : x
  2. Step 2: Convert to fraction form
    31,781.21/47,661.35 = 10,715.56/x
  3. Step 3: Cross multiply
    31,781.21x = 47,661.35 × 10,715.56
  4. Step 4: Simplify right side
    31,781.21x = 510,718,055.61
  5. Step 5: Solve for x
    x = 510,718,055.61/31,781.21
  6. Step 6: Final answer
    x = 16,069.81

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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.