Home / 31,785.78-47,645.86-20,714.10

Finding the Fourth Proportional to 31,785.78, 47,645.86 and 20,714.10

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Solution

The fourth proportional to 31,785.78, 47,645.86 and 20,714.10 is: 31,049.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,785.78 : 47,645.86 = 20,714.10 : x
  2. Step 2: Convert to fraction form
    31,785.78/47,645.86 = 20,714.10/x
  3. Step 3: Cross multiply
    31,785.78x = 47,645.86 × 20,714.10
  4. Step 4: Simplify right side
    31,785.78x = 986,941,108.63
  5. Step 5: Solve for x
    x = 986,941,108.63/31,785.78
  6. Step 6: Final answer
    x = 31,049.77

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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.