Home / 20,785.28-31,176.98-7,636.69

Finding the Fourth Proportional to 20,785.28, 31,176.98 and 7,636.69

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Solution

The fourth proportional to 20,785.28, 31,176.98 and 7,636.69 is: 11,454.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.28 : 31,176.98 = 7,636.69 : x
  2. Step 2: Convert to fraction form
    20,785.28/31,176.98 = 7,636.69/x
  3. Step 3: Cross multiply
    20,785.28x = 31,176.98 × 7,636.69
  4. Step 4: Simplify right side
    20,785.28x = 238,088,931.40
  5. Step 5: Solve for x
    x = 238,088,931.40/20,785.28
  6. Step 6: Final answer
    x = 11,454.69

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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.