Home / 20,785.62-31,178.43-9,700.07

Finding the Fourth Proportional to 20,785.62, 31,178.43 and 9,700.07

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Solution

The fourth proportional to 20,785.62, 31,178.43 and 9,700.07 is: 14,550.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.62 : 31,178.43 = 9,700.07 : x
  2. Step 2: Convert to fraction form
    20,785.62/31,178.43 = 9,700.07/x
  3. Step 3: Cross multiply
    20,785.62x = 31,178.43 × 9,700.07
  4. Step 4: Simplify right side
    20,785.62x = 302,432,953.49
  5. Step 5: Solve for x
    x = 302,432,953.49/20,785.62
  6. Step 6: Final answer
    x = 14,550.11

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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.