Home / 20,689.89-31,036.79-5,900.91

Finding the Fourth Proportional to 20,689.89, 31,036.79 and 5,900.91

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Solution

The fourth proportional to 20,689.89, 31,036.79 and 5,900.91 is: 8,851.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.89 : 31,036.79 = 5,900.91 : x
  2. Step 2: Convert to fraction form
    20,689.89/31,036.79 = 5,900.91/x
  3. Step 3: Cross multiply
    20,689.89x = 31,036.79 × 5,900.91
  4. Step 4: Simplify right side
    20,689.89x = 183,145,304.48
  5. Step 5: Solve for x
    x = 183,145,304.48/20,689.89
  6. Step 6: Final answer
    x = 8,851.92

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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.